Mine had to be in Halo 2 after numerous attempts and over several hours of gameplay, on the level Metropolis. We had finally gotten a banshee through the tunnels and boarded it, right at that pesky moment where you had a literally a millisecond to board it before it disappeared. We flew all way the up top to get the plasma rifle that shot the Scarab Gun. Hands down the coolest shit ever! My body was definitely not prepared for that....