Warrenpoint Town condemned Ards to bottom position in the Premiership and probable relegation by trouncing Dungannon Swifts at Stangmore Park.
Stephen Hughes opened the scoring on eight minutes with a 20-yard shot and Marty Havern made it 2-0 with a cool finish on 27 after slick build-up play.
Daniel Hughes slipped the ball under the goalkeeper for the third two minutes later.
Stephen Moan fired a left foot shot into the corner in the 67th minute.
Moan combined well with Havern to set up the scoring opportunity.
The Swifts squandered two first-half chances when Jonathan Parr saved a Marc Brolly header and Gary Liggett was off-target with a header.
Warrenpoint now lie 10 points ahead of Ards with just three sets of fixtures remaining.
Niall Currie's side will be relegated if the eventual Championship One winners have applied for a licence to play in the top flight.
Warrenpoint are just one point behind 10th-placed Ballinamallard as they attempt to avoid a potential promotion/relegation play-off.