Warning: some people might consider this common sense, don't read it if you already think you know what it is about and are going to say that.
What you need:
Rogue
-or-
Hunter
and either Misdirection - Spell - World of Warcraft or Tricks of the Trade - Spell - World of Warcraft
Basically Misdirect or Tricks of the Trade on your least favorite raid member, and then hit Boomer XP-500 - NPC - World of Warcraft with a ranged attack and watch them run over and blow them up! It's simple, sometimes fun, and people hardly ever realize that you casted it on them if you do it as they run through the frogger.
Also, some of you might not like to grief, please don't say that as we already know it's kind of messed up to do this.