League brings out the Darkside of us. We laugh at deaths deemed funny to us.

http://img3.wikia.nocookie.net/__cb20140317103226/creepypasta/images/f/fe/LightYagami02.gif

Quinn gets pulled by blitzcrank, uppercutted into the air, then electrified by his ult and dies. Some people would find this funny. The blind Lee Sin is fighting the blue golems in the jungle. When he's done, he turns around and finds a jack in the box that fears him then kills him. People finds this funny.

A random rocket kills you and maybe two other teammates while you just finish dragon. Who isn't going to laugh?

http://stream1.gifsoup.com/webroot/animatedgifs2/1794673_o.gif

No one realizes it until they think about it...