Fun w/ AKs

[The Dude]

Bellagio 30-60. BB in this hand is a 50ish Asian guy who knows how to play tight, winning poker, but gets frustrated easily. He's not the best player postflop, but he's not terrible either. He's just lost a couple hands, so I'm assuming he's on tilt right now. Also, I've been raising and 3betting a lot the past two orbits (specifically him a couple times, too).

Preflop:
The Dude raises A[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img] UTG. Folded to BB who hesitates (the vibe I got was that he almost folded) and calls.

Flop: (4.67 SBs) A[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/heart.gif[/img] <font color="blue">(2 Players)</font>
BB checks, The Dude bets, BB calls.

Turn: (3.33 BBs) 8[img]/images/graemlins/spade.gif[/img]
BB checks, The Dude bets, BB calls.

River (5.33 BBs) T[img]/images/graemlins/spade.gif[/img]
BB donks. The Dude...?