[luckychewy]

does 'the key' have anything to do with him possibly trying to use a 1k and a 500 chip to make the call and in the process of putting the chips in the pot, mistaking a 500 with a 5k? when you say he needs more aggression in his game it could be indicative of him being prone to slowplay a set on the flop, and if he doesn't raise aq/aj pf and you assume he folds qq to the turn lead then i guess his flatting range and 'fake' raising range on the turn are only really consistent of aa/kk and maybe ak. the thing is i feel like people will slowplay sets and play ak a bit faster because they still have a small fear of being drawn out on.

EDIT: and he exclaimed call! after he realized he threw the wrong chip out with the 1k chip.