For all of us long time, and even short time game players, we all have stories of rediculous, funny, or odd things that have happened to us when playing single player or multiplayer games.
I'll start off with one that happened to me in Halo 2. Was playing on Uprising as the Arbiter, and gone through a rather combat heavy section. I was down to the last 30% charge on my last remain weapon, a plasma pistol, when I came across a group of allies; specifically Elites and some grunts. Well, one of the grunts had a Fuel rod gun that he was hefting about, and since I had no intention about being out gunned by an ankle bitting grunt I swapped my dinky plasma pistol for his FRG. He looks at the pistol for a second, looks back up at me, then gets down on all fours and throws a temper tantrum! Cheeky little twerp.
And the worst part is, later on he shoots me in the back with that popgun plasma pistol... and kills me. I made sure to whack him one when I reloaded the checkpoint.