Ragequit.

i have only ragequit once. and that was recent in Street Fighter 4. I was having a bad day and thought a little SF wouldnt hurt. got pinned up with a fucking scrub (Ken) and he was winning by just spamming Hadokens and Shoryukens. and this snot nosed kid was just spamming my ear with his pre-pubescent nonsense. so as soon i managed to beat him to go into Round 3, i quit.

I don't quit if I'm playing multiplayer, unless it's for real life reasons.  Other than that, I'll quit a game's single player if I'm getting too frustrated.  The last time I can think of was playing Seth on Street Fighter IV.