We don't know the action preflop, but we have to imagine a decent amount of betting went on, because there was a lot of chips already in the pot. On a flop of it was the Big Blind who put out a bet. Douglas Lang made the call, and a player in middle position moved all in for almost 20,000.
The Big Blind only had around 12,000 and he spent a good two minutes contemplating before he ultimately made the call. Action was then on Lang whom the table and had seemingly forgot about. After almost four minutes Lang made the call and flipped over for a pair of jacks and an ace kicker. The player in Middle Position turned over for a nut flush draw and a run run straight draw. The Big Blind upset that Lang made the call showed the table for a pair of jacks with a ten kicker.
Lang was amazingly ahead with his pair of jacks going to the turn-river. hit the turn much to the Big Blind's delight as he managed to grab a open-ended straight draw.
With the rattling off on the river the hand was done and a very excited Lang cheered in celebration as he grabbed the chip lead.