Let me set the record straight
Cain's knee exploded .5 seconds before he was bopped by an uppercut, and when he stepped out after the bopp his knee was already dead and he got no support from his leg thus collapsing and screaming on the way down
Nobody in the history of the sport has been KOed and screamed on the way down to the canvas, as Gödel proved
Thus, the bopp was incidental and the main reason for his loss was his exploding knee.
See images below for proof
Before Bopp:
The knee is buckling here and clearly exploding as is evident by the awkward angling
This is right after the bopping
Foot already completely cooked due to knee having been exploded
Cain screaming for his life due to collapsed knee, not due to bopp, as Gödel proved