There have been similar incidents in American sports (hockey, baseball, basketball, football, racing). A crowd, or someone in it, starts out with some verbal abuse for a player on the field. Then, maybe the trash-talk escalates into something being thrown at (or beer poured upon) the player. The player, having had more than enough of this, charges into the crowd, fists swinging, and mayhem ensues.

Kind of a similar thing recently in Peru. The sport was bullfighting, but the theme remains the same. The crowd had been taunting the bull, along with throwing objects at it, until the bull lost his temper and gained quite a vertical leap:

Authorities say there were at least 20 people injured, but luckily none of the injuries are life threatening. As for the bull...well, you can probably guess.

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