Dan Martin opened to 3,500, Jason Koon three bet to 11,000, Mikiyo Aoki four bet to 25,000, Martin folded, and Koon made the call.
The flop came and Koon check-called a bet of 35,000. The turn was the and Koon checked. Aoki announced all in and Koon went into the tank.
Koon agonized over his decision for a minute or two, talking to himself and trying to figure out what Aoki could be shoving with. The call would but Koon at risk, and after cutting down all his chips, Koon said fold and flicked his cards into the muck.
Aoki showed him and Koon nodded his head.