Humberto Brown fought Gabriel Benitez in an undercard fight at UFC 180, and his fighting wasn't the main thing people noticed.
We can't be 100 percent sure that's poop, but ... that's poop, right? That's poop. He pooped himself. During a fight. On the one hand, we're surprised this doesn't happen more often because athletes have so much physical activity going on and no bathroom breaks and sometimes they might slip. On the other hand ... he pooped himself.
Brown also lost after Benitez put him in a guillotine choke, and got a point deducted for trying to hit Benitez in the groin, so, not his best night.