Colchester boss Joe Dunne admits he is fearing the sack after his 10-man strugglers were thrashed 5-1 by MK Dons.
The Dons climbed up to second in npower League One thanks to Luke Chadwick's brace and further goals from Shaun Williams, Jon Otsemobor and substitute Ryan Lowe.
"It's a bad run and managers lose their job for that kind of stuff - the buck stops with me," said Dunne. "We've lost five in six. Prior to that we were doing great but that counts for nothing now.
"Although we were bottom when I took over, we moved our way up and now we're slipping back down. I don't want to lose too many more or else I won't be standing here talking to you guys.
"We've competed in most games but here we didn't and we got what we deserved against a very good side. We've had a frank conversation in the changing room, and that's putting it politely. It has to stop because we are now showing relegation form - it's disappointing.
"I tried to let them do it this time because they don't talk. They don't talk on the pitch and when you're playing good sides you need people to organise, but we didn't do any of that.
"MK Dons taught us a footballing lesson and a work-rate lesson. We made a lot of individual errors and team errors and it could have been 10."
Dons boss Karl Robinson said: "It was a fantastic performance. Over the course of the last three or four weeks we've added three young players who have got plenty of pace, and you've seen that.
"They are frightening when they open them legs. Patrick (Bamford) has a deceiving type of pace like Fernando Torres, where he doesn't look like he's going to get there but then he opens his legs with his long strides.
"The penalty was a phenomenal turn of pace from him and he set three goals up in the period he was on. He also had two or three shots and he was always a threat against a good Colchester side."