I had this one conversation with some guy who was playing pro evo which went like this.
Me: Who's winning?
Other guy: Your mum.
Me: that's not funny.
Other guy: SHUT UP!
Me: Why do you have to be so defensive?
Guy playing the other guy: SHUT UP, HE DOESN'T LIKE YOU RETARD!!
Other guy: Why do you have to use nerdy words like "defensive"?
Other guy: (in sarcastic voice) ooh look, Everything's "defensive", I'm "defensive", you're "defensive". (Starts playing crappy emo music on phone)
Me: Can you stop playing that?
Other guy: SHUT UP! JUST BECAUSE I'M BETTER THAN YOU AT GUITAIR HERO!!
Me: Wtf? This has nothing to do with guitar hero.
Other guy: SHUT UP YOU RETARD!
At this point I left. Yep, you can get some real retards at my school.