Fuming Terry Butcher has cancelled his Inverness players' day off and threatened wholesale changes after their 4-1 defeat at home to Rangers.
The visitors, whose squad will learn this week whether they will be made redundant after administration, were 3-0 up after 36 minutes.
"Anger," was how Butcher responded to be being asked for his reaction.
"There's not one positive thing today. Nothing at all. The players are in again 10 o'clock tomorrow morning."
Butcher was particularly annoyed that it was players from his former club who showed greater hunger despite the threat hanging over their jobs.
"Lack of attitude, lack off application," he told BBC Scotland. "I am not going to stand here and defend my players after that performance.
"Beaten by a much better team, a team that might never play together again.
"I said to my players, who would have said that was a team heading for redundancy?
"Which club is in financial turmoil? It didn't look like Rangers, did it?
"I think it's indefensible.
"If they are not going to run in the game, or do what they should have done, they will do it tomorrow."
Inverness were first to threaten, but it was downhill after Steve Davis put Rangers ahead after six minutes.
Butcher insisted that their capitulation was out of character.
"We are not like that at all and they've shown people around the world a side of Inverness Caley Thistle I don't like and don't want to see ever again," he said.
"We had a bright five minutes and that was about it and then Rangers have got the goal and then the second goal and we have just fallen apart.
"We have a lot of work to do this week to get them back to any level of performance that we require and demand at this club.
"Now I have a few players coming back, I might make wholesale changes and that gives me the opportunity to do that."