From FIFA Laws of the game (I know, they are not always enforced…)
Sending-Off Offences
A player is sent off and shown the red card if he commits any of the following seven offences:
1. is guilty of serious foul play;
2. is guilty of violent conduct;
3. spits at an opponent or any other person;
4. denies the opposing team a goal or an obvious goalscoring opportunity by deliberately handling the ball (this does not apply to a goalkeeper within his own penalty area);
The ball is played towards goal by the attacking team and a defender jumps and handles it as the attacking player moves towards the ball. The defender is sent off for denying the opposing team an obvious goalscoring opportunity.
ooo haha… red card for splitting at ppl…