With around 5,000 in the pot and three players in the hand by the flop, Marc Naalden (under the gun) bet out 3,700. The gentleman in the cutoff looked at his hole cards and presumably didn't like them as he folded. The gent in the small blind, however, spent some time counting various stacks of chips before flat-calling.
They went heads-up to the turn and Mr. Small Blind instantly announced all in. Naalden grinned broadly and folded.