For you WoW (World of Warcraft) gamerz our there, the story of Leeroy Jenkins is practically legend. For those of you who've never seen it/heard of it, let me fill it in for you:
A bunch of friends are planning a raid on a room, creating an elaborate plan for success. One of their friends, Leeroy Jenkins, is AFK (Away from Keyboard) during all of the elaborate planning and returns just in time to lead the charge into the room by himself, obliterating the element of surprise. He screams his now-famous battle cry and leads all of his friends to an early and absolutely catastrophic death.
I've found the video for you, it's extremely popular all over the internet (it even made an appearance in a Jeopardy! clue once. Don't believe me? Look it up!) so you should definitely see it at some point so you can catch any veiled references to it in the future.
The reason for this blog post is because of a recent internet find a friend showed me. Leeeeeeeroy Jenkins: Live Action! Enjoy, and LAUGH!
Oh, and here's the Jeopardy! clip, because I don't expect you to have to go look it up.