Did mayhem take a dive?

Into an Olympic size pool and swim 100 laps just before the fight?

 He surely took the cardio issue lightly.  Too much Hollywood imo.

He had plenty of energy when he was dancing and clapping on his way into the cage.  He may have worn himself out.

i see what you did there...

Pencil - I was quite amazed that Bisping couldn't put Miller away though despite him being so gassed he could hardly move. When the fight got stopped you could hear Miller tell the ref "I'm just tired" and that's certainly what it looked like.

Miller can take a punch but had the fight not been stopped Bisping would have done more than put him away, he'd have near killed him.