It isn't something we see often. It normally happens so fast that we don't even realize it has occurred. In fact, that's exactly what happened on Saturday night when Robert Peralta and Mackens Semerzier literally clashed heads, leading to a TKO finish by Peralta at 1:54 of the third round.
This is a primer for the featherweight bout between Mackens Semerzier and Robert Peralta that will take place at UFC on Fox 1. The bout is a part of the preliminary card and will be streamed live on Facebook.