well the only think i can think of was he had a set on the flop. like dueces or threes. as for if he was ok by calling preflop i think so. i would make a call like that with a pocket pair just to see the flop. odds for are pretty good that i hit a set. thats just just me though. other than i cant see him playing some bs cards and hit the str8. well ill retract that. i have seen bs cards played and lose to river str8. lol