Body Language
On the flop, Tezay checked, and Huynh put out a bet. Tezay sat for a moment to consider his action before he noticed something peculiar. Huynh was sitting with his hands around his cards, and there was a vein beating noticeably in his wrist. Tezay pointed it out to the table and even called several players over from adjacent tables.
Tezay observed that his opponent's heart was only beating at about 80 bpm, and he therefore must have been comfortable and strong in the hand. Based on that information, he laid his hand down, while Huynh opened up his cards: !