If you are wondering who Jurgen Klopp is, well, he's the guy in charge of the Dortmund Soccer team in the UEFA Champions League.
And Klopp has a reputation for not losing his mind over a call.
Check out his reaction early Wednesday during a Champions League match vs. Napoli. He was less than thrilled the referee's let an injured Napoli player back on the field before a free kick, which they converted for a goal.
Folks, this is kinda scary...and got Mr. Klopp booted from the game: