Don't make Joe Hart angry, you won't like him when he's angry!
Footballers are either really relaxed guys who just on with their game or they're absolute screaming psychopaths, and we would definitely categorise Joe Hart as psycho!
During Manchester City's first half against Chelsea, England's number 1 was trying to get the attention of Yaya Toure so he could find the big midfielder's head, now we're guessing Toure was ignoring him because Hart went absolutely mental!
Good god! We definitely wouldn't want to see what he's like when he's angry... oh wait, we have seen what he's like when he's angry!
Let us take you back to last summer and England's opening World Cup game against Italy. After Andrea Pirlo's free-kick almost went in, Hart wanted to get the ball out as quickly as possible and went absolutely nuts at the poor ball boy, dropping the f-bomb for good measure.
We've learnt today that you NEVER want to make Joe Hart angry because you won't like him when he's angry.