I have a few, but I can't think of them right now! (When you are as badass as me, (Which you are!) you tend to think that all the most badass occurrences are just a walk in the park.)
I was playing Beat Hazard Ultra. Just loaded up Octavarium by Dream Theater. That is a 24 minute long song. I lost all but my last life in the first minute. Chugging along like the little spaceship that could, by golly, I survived that ordeal. 23 minutes of pure survival instinct!
I was playing Super Smash Brothers Brawl, in an actual, real prizes tournament. Playing snake, vs. an Ike, I run at him, turn, leap, back kick him off the edge. Thinking I had just ended it, I taunted. As he attempts to recovers, he attempts to attack me, gets hit with the box, and instead ends up doing his airborne neutral A, sending him to his doom. Snake box kill. Awww yeah.