Brisbane Heat captain Chris Lynn has lambasted his side's record BBL collapse against the Melbourne Renegades as "piss-poor" and "embarrassing".

The Heat were 0 for 84 after 5.5 overs chasing a target of 165 at the Gabba only to lose a record 10 for 36 to fall 44 runs short and put their finals hopes in severe jeopardy.

This followed an embarrassing 10-wicket loss to the Adelaide Strikers last Thursday when they were bowled out for 100. They were also bowled out for just 109 earlier in the tournament against the Perth Scorchers attempting to chase just 150.

Lynn did not pull any punches following his side's latest performance.

"I've seemed to be in this position a couple of times this year," he told Channel Seven. "I can't really sugar-coat it, it was a piss-poor effort. Another embarrassing effort. We got off to a flyer. These guys that are playing they're not first or second-year players, they've got four or five years under their belt.

"We're doing all the right things at training but I don't know what is going on out in the middle because we just seem to panic. It's not just a wicket or two, it's a train wreck."

Lynn was the first man to fall holing out to deep long-on in the last ball of the powerplay which then triggered the stunning collapse. The Heat lost three wickets in four balls including AB de Villiers and Matt Renshaw, who both fell to Player of the Match Cameron Boyce in the seventh over.

Lynn and coach Darren Lehmann called a strategic timeout at the end of the seventh over to try and steady the ship but the message to rebuild consolidate was not heeded.

"Something has got to change," Lynn said. "Our preparation has been awesome, you can't fault that but it's just out in the middle. I don't know what goes through our guys' heads. We had our strategic timeout, we had our plans in place not to play dumb cricket, knock it around, hit the guys in the deep, no run-outs, um … yeah, I'm pretty speechless."

Lynn was probed further by former Heat captain Brendon McCullum, now a Channel Seven commentator, and fellow commentator Ricky Ponting, as to why the Heat's batsmen are recidivists but he could not find an answer.

"I don't know," Lynn said. "I'm standing here for the second time after an embarrassment. It's the biggest record loss after a powerplay of [84]. We were cruising and doing better than walking it in, I don't really know what to say, to be honest.

"Every player has got to look in and not out. We're playing as a group of individuals and unless we change that we're going to end up missing the finals again which is not good enough in the position we're in and the players we've got in the line-up."

The Heat could have moved to fourth on the table with a victory, ahead of both the Sydney Thunder and the Perth Scorchers, but instead they remain sixth with just three games remaining and their net run-rate took a battering as a result of the stunning collapse.

Alex Malcolm is a freelance writer based in Melbourne