Paint No Good

Ed Miller raises from UTG+1 and is 3-bet by the player in the 1 seat. Blinds are at 75/150, Miller 4-bets it up to 2200, only to be 5-bet up to 6550.
Miller works the bet through his head, shuffles a stack of green 5000 chips in his hand, but doesn't look as though he wants to make the call.
He eventually kicks his cards over to the dealer, and the other player shows some frustration now getting a call, and he flips over KK.
Miller quietly mouths that he had JJ.