Clamp between the plenum and the turbo, effectively air would be leaking out causing a huge drop of pressure/boost coming from the compressor. He was 40mph down on the straights. Consider that Mclaren's performance is rubbish because they are 5-15mph down depending on the sector and well, yeah, no chance in hell for that car.
Ridiculous as well as you're talking about what is effectively another $5 part like what ended his Australian GP last year, a $1 spark plug cost him a cylinder.
Would be a bit of a shame for me if Button did Top Gear, Clarkson and the others are huge buffoons and most of the show is barely watchable. None of there stuff requires or needs a top driver, just an idiot doing stupid stuff on camera. He'd basically be wasted on it where as he'd give great insight if given a role in F1, presenter/pundit/commentator. Though that would require him travelling constantly to do the show which he may want a break from.
I'm debating how much to read into next years Mclaren performance from his decision though, does he know the engine won't be good enough or does he just think he's being lied to about how good it will be next year. Ron was talking up the engine last year like it was fantastic and would be ultra competitive, maybe he told the drivers that last year, as such you wouldn't suddenly believe him about next year even if he was telling the truth.
It's been painfully obvious all year that he's being paid to say what he does in interviews about the progression and improvements of the team. There have been slip ups from both drivers all year but Button seems to have been giving joke replies in/around his PR speak in the last couple of races and some of his interviews this weekend were damn funny. Most people all weekend saw those interviews as someone who no longer wants to keep his job and thus doesn't need to stick to the company message.
I was told by someone in Redbull last November that everyone knew the engine/ power plant was awful.