Unpredictable street fighting to the last second

The guy in the dark shirt holds out his hand at first, probably to shake the other guy's, but he takes a big right straight back. He takes several punches right afterwards, but doesn't go down. On the contrary, he comes back strong and throws a few good punches. We think he's got the upper hand. Then, without warning, the other man catches him and lands a clean powerslam. The fight changes direction several times, and it's impossible to tell who's dominating until the very end.