Okay let's see...
Turn items on and complain about how they were OFF when you lose
when somebody is beating you, nobody says anything and you just scream STOP TAlKING, UR MAKING ME LOSE
Asking about characters that aren't in the game -_-
Calling me a noob because I lag items (WTF -_-)
When you lose, say you could own them at soul calibur
When you lose, say you could own them at madden (T_TU)
When you lose, say that if the character your playing as were in the game, you would have won
When you lose, go to your parents and say the person who won beat you, or fraze it in another way that gets them in trouble
Ask someone to kill themself
ask someone to turn on items when they're already on, and your just losing
Let yourself lose, then pull out the memory card or the disk
(I lost everything on melee because of that one...my cousin lost, grabbed the memory card out of the cube and chucked it across the room.)