Roux Folds an Ace, Although It's Not Immediately Obvious
Nothing happened at all for five minutes, and we began to fear that it was one of those great situations where both players thought it was the other's turn to act -- but eventually Roux checked his hole cards and then handed them back to the dealer, and it transpired that Allen had pushed all in on the river, and got the bet through.
The long pause was explained when Roux admitted that he had folded an ace.