LOL maybe I am the sidekick. I don't know if it is a mid20s thing although yes I am 25, nearly 26. My mum and her sisters have the same horrible temper, which is why I try so hard to bite it down because I don't want to be like them.
I never used to be able to control it, but I don't know if it is a nature / nurtue thing. I hope my little girl doesn't grow up witha temper like mine :-)
I think you just have to learn to put yourself a) in the recipent's place but sometimes it can make you angrier or b) have a serious think about where your anger issues can lead you to. The only one to really suffer in the end is you, you'll feel like an idiot for being so wound up in the first place, probably annoyed at yourself for giving someone the satisfaction of winding you up and letting you fly, plus a possible criminal conviction, losing your job, family, friends, etc. It's much healthier for you and those around you to take a deep breath and physically remove yourself from the situation that is making you angry.