A pitch invasion can land you in plenty of trouble.
For a start, it's illegal. But if that's not enough to dissuade you, have a look what happens to this person.
As Costa Rica faced South Africa on Thursday night, this pitch-invader spied was on the end of a painful-looking tackle from one of the stewards.
Seen in tears as he was escorted from the pitch, Real Madrid goalkeeper Keylor Navas took pity on him.
The man that Florentino Perez tried to offload to Manchester United in summer can be seen comforting the crying pitch-invader and even posing for a few pictures.
https://youtu.be/Y9E4agU5Cxk
