When I want to be a proper troll on FIFA, which only happens when I play someone I come to dislike for some reason, I run around doing the double windmill celebration. Right before the game is to take you back to playing mode, that's when I hit them with the Gangnam Style celebration. Why? Because when you do this, you can actually prolong the celebration sequence, and that is annoying as hell. If someone has really pushed my buttons, which happens VERY rarely, then I pause the game, right after watching ALL the replays of course, to send them a little message asking why they didn't defend the move better.
For those of you who find such behavior very unbecoming in a 40 year old - I can only agree. I really need to grow up into a proper adult one of these days. 🙁