Andrew Fleming scored twice as Morecambe came from behind to stun Southend at Roots Hall.
Freddy Eastwood hit the post with a header before Kevan Hurst put the Blues ahead with a deflected strike.
But Fleming's 20-yard shot made it 1-1 and another fierce shot put the Shrimps ahead 17 seconds into the second half.
Jack Sampson added a third with a deflected long-range effort and the visitors held on despite having substitute Robbie Threlfall sent off.
Threlfall saw red for for a foul on Anthony Straker with 20 minutes remaining but Southend could not hit back to prevent a third successive defeat.
VIEWS FROM THE DRESSING ROOM
Southend United manager Phil Brown told BBC Essex:
"There were too many off days for big players in our team today. I thought the first goal was going to be important, how wrong can you be?
"I'm disappointed with the defending and disappointed at the thought process and decision-making of some senior players.
"I think they've done a turn on us to be brutally honest. They slowed the game down at the right time, we were trying to play with a tempo but you can't do that when you are giving the ball away or making bad decisions.
"Consequently, that compounded in a poor second-half start and then a third goal. You are climbing a mountain then and unfortunately we didn't."
Morecambe manager Jim Bentley told BBC Radio Lancashire:
"It was a tough game because Southend have been decent at home.
"I was disappointed in our first half performance and we were fortunate to come in on level terms at half-time.
"It was the first time this season that I've properly lost my rag and maybe I've got to start doing that at the start of the game because they went out in the second half as a different team."
Live text and stats
Saturday, 7 September 2013
08 Timlin yellow card (Atkinson 62)
11 Straker (Payne 74)
33 Woodrow (Corr 61)
06 Diagne yellow card (Threlfall 63 red card)
09 Sampson (Williams 90+1)
27 Amond (Mwasile 84)
Ref: BreakspearAtt: 6,080
Attempts on target
Attempts off target
90:00+4:34 The referee blows for the end of the match.
90:00+3:37 Kevan Hurst takes a shot and missed to the left of the target.
90:00+3:30 Corner taken by Freddy Eastwood from the left by-line.
90:00+1:32 John White takes a shot and missed to the right of the target.
90:00+0:47 Substitution Ryan Williams on for Jack Sampson.
88:32 Free kick taken by Barry Roche.
88:12 Barry Corr is ruled offside.
87:53 Corner from the left by-line taken by Kevan Hurst.
87:29 Barry Corr takes the chance to get an effort at goal.
85:36 Header at goal by Barry Corr.
85:30 Kevan Hurst takes the free kick.
84:46 Kevin Ellison gives away a free kick for an unfair challenge on John White.
84:11 Clearance made by Alex Kenyon.
84:07 Kevan Hurst produces a cross.
83:06 Substitution (Morecambe) makes a substitution, with Joe Mwasile coming on for Padraig Amond.
82:46 Clearance made by Andrew Parrish.
82:38 The ball is delivered by Jack Payne.
81:03 Kevan Hurst takes the free kick.
80:52 Jack Sampson gives away a free kick for an unfair challenge on Ryan Leonard.
79:15 Shot by Jack Sampson went wide of the right-hand post.
78:41 Jack Payne takes the chance to get an effort at goal.
77:41 Ben Coker sends in a cross.
76:44 A cross is delivered by John White.
76:02 Free kick taken by Daniel Bentley.
75:53 Foul by Padraig Amond on Ben Coker, free kick awarded.
75:20 Ben Coker sends in a cross.
74:41 Andrew Wright takes the free kick.
74:12 Mark Phillips gives away a free kick for an unfair challenge on Jack Sampson.
73:20 Substitution Jack Payne is brought on as a substitute for Anthony Straker.
72:38 Daniel Bentley restarts play with the free kick.
72:33 Free kick awarded for a foul by Jack Sampson on Luke Prosser.
70:46 Padraig Amond takes a shot and goes harmlessly over the bar.
70:02 Freddy Eastwood has an effort at goal and missed to the right of the goal.
69:51 Daniel Bentley takes the free kick.
69:27 Sent off
69:27 Robbie Threlfall is sent off by the referee.
69:11 Anthony Straker fouled by Robbie Threlfall, the ref awards a free kick.
68:48 Luke Prosser manages to make a clearance.
68:37 Corner from the left by-line taken by Andrew Fleming.
68:14 Andrew Wright produces a cross.
67:02 Daniel Bentley takes the free kick.
66:59 The offside flag is raised against Kevin Ellison.
66:04 Free kick taken by Barry Roche.
65:46 Unfair challenge on Kevin Ellison by John White results in a free kick.
65:28 Andrew Wright manages to make a clearance.
65:22 Kevan Hurst delivers the ball.
63:18 The ball is swung over by Kevan Hurst.
62:22 Substitution Robbie Threlfall is brought on as a substitute for Tony Diagne.
61:07 Substitution Will Atkinson comes on in place of Michael Timlin.
60:52 Substitution Cauley Woodrow leaves the field to be replaced by Barry Corr.
59:52 Stewart Drummond makes a clearance.
59:36 Free kick crossed by Ben Coker.
59:12 Tony Diagne receives a caution.
58:57 Unfair challenge on Kevan Hurst by Tony Diagne results in a free kick.
58:26 Barry Roche restarts play with the free kick.
58:22 Free kick awarded for an unfair challenge on Mark Hughes by Luke Prosser.
58:01 Ben Coker sends in a cross.
57:45 Corner taken by Michael Timlin from the right by-line.
57:20 Free kick crossed by Kevan Hurst.
56:46 Andrew Parrish challenges Cauley Woodrow unfairly and gives away a free kick.
55:47 GOAL - Jack Sampson:Southend 1 - 3 Morecambe Jack Sampson grabs a goal with a right foot finish. Southend 1-3 Morecambe.
53:50 Andrew Wright restarts play with the free kick.
53:43 Ben Coker challenges Andrew Fleming unfairly and gives away a free kick.
53:04 Corner from the right by-line taken by Andrew Fleming.
52:39 Padraig Amond has a headed effort at goal.
52:14 Corner taken by Andrew Fleming.
51:11 Ryan Leonard takes a shot and went wide right of the target.
51:03 Clearance made by Tony Diagne.
50:59 The ball is sent over by Michael Timlin.
50:21 Corner taken by Andrew Fleming from the right by-line.
49:55 Kevin Ellison takes the chance to get an effort at goal. Luke Prosser gets a block in.
49:39 Chance falls to Kevin Ellison who heads at goal.
49:27 Corner taken by Andrew Fleming from the right by-line.
47:37 Mark Hughes restarts play with the free kick.
47:25 Foul by Cauley Woodrow on Tony Diagne, free kick awarded.
46:36 Luke Prosser restarts play with the free kick.
46:28 Jack Sampson gives away a free kick for an unfair challenge on Luke Prosser.
46:08 GOAL - Andrew Fleming:Southend 1 - 2 Morecambe Andrew Fleming scores with a right foot finish. Southend 1-2 Morecambe.
45:01 The match restarts for the second half.
45:00+2:22 The referee blows for half time.
45:00+2:12 Corner taken by Ben Coker from the left by-line.
44:49 Michael Timlin receives a caution for dissent.
44:23 Shot by Kevin Ellison cleared the net.
41:43 Barry Roche takes the free kick.
41:33 The assistant referee signals for offside against Cauley Woodrow.
40:27 Barry Roche restarts play with the free kick.
40:24 The official flags Freddy Eastwood offside.
38:55 Free kick taken by Daniel Bentley.
38:50 Foul by Andrew Fleming on Luke Prosser, free kick awarded.
37:49 Daniel Bentley takes the free kick.
36:30 Padraig Amond concedes a free kick for a foul on Mark Phillips.
34:18 GOAL - Andrew Fleming:Southend 1 - 1 Morecambe Andrew Fleming scores a left footed goal. Southend 1-1 Morecambe.
33:35 The ball is delivered by John White.
32:37 Andrew Parrish manages to make a clearance.
32:29 The ball is sent over by Kevan Hurst.
31:34 Header by Luke Prosser goes harmlessly over the bar.
31:18 Corner taken by Kevan Hurst from the right by-line.
30:28 Jack Sampson concedes a free kick for a foul on Mark Phillips.
29:42 GOAL - Kevan Hurst:Southend 1 - 0 Morecambe Kevan Hurst slots the ball right footed into the goal. Southend 1-0 Morecambe.
25:31 Header at goal by Cauley Woodrow misses left of the target.
25:19 Free kick taken by Ben Coker.
25:07 Foul by Alex Kenyon on John White, free kick awarded.
24:17 Jack Sampson takes a shot and cleared the crossbar.
24:02 Tony Diagne crosses the ball.
19:23 Free kick taken by Barry Roche.
19:01 Corner from the right by-line taken by Ben Coker.
17:46 Free kick taken by John White.
17:34 Mark Hughes challenges Cauley Woodrow unfairly and gives away a free kick.
15:47 Clearance made by Alex Kenyon.
15:41 The ball is crossed by Ryan Leonard.
11:58 Free kick taken by John White.
11:52 Kevin Ellison gives away a free kick for an unfair challenge on Mark Phillips.
7:53 Free kick taken by Daniel Bentley.
7:47 The assistant referee signals for offside against Andrew Fleming.
7:32 Corner taken by Andrew Fleming from the left by-line.
4:54 Free kick taken by Daniel Bentley.
4:46 The referee blows for offside.
4:13 Free kick taken by Barry Roche.
4:07 Free kick awarded for a foul by Cauley Woodrow on Mark Hughes.
2:51 Header at goal by Freddy Eastwood strikes the woodwork.
2:07 John White restarts play with the free kick.
2:00 Unfair challenge on John White by Jack Sampson results in a free kick.
0:44 Free kick taken by Barry Roche.
0:24 The assistant referee flags for offside against Freddy Eastwood.
0:00 The match begins.
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