A little cross-posting here.
A glitch in Oblivion counts as one of my all time favourite gaming moments:
Love stories like this.
I had something in a similar vein happen to me. My memory is fuzzy on the details, but there's a quest in the Imperial City where you have to investigate corruption within the city guard. If all plays out as planned, you'll send the guilty captain away to prison and the quest seems to conclude.
......except something like 14 in-game days later, after this guy and his quest are long forgotten, this bitter asshole will break out of prison, wearing nothing but his peasant trousers and a raggedly shirt, and hunt you down across Cyrodiil, wherever you may be. I just happened to be on the road east of Chorral, hacking at goblins and otherwise enjoying the morning stroll, when I could see far off in the distance a strange looking man charging full speed my way. When we finally closed the distance enough for me to make him out, I realized this was no run of the mill bandit, but a loony-toon wielding a knife with blood-lust in his eyes. I turned tail and ran, him following me all the while, back to Chorral where he met his end with help from some of his former city guard friends.
After he bit the dust, I walked over to his corpse and sure enough, it was the guard I had put away. I remember marveling at the whole thing; that at the very moment I was out for a walk, somewhere else in this world was an angry disgraced man planning and executing his prison escape to exact revenge on the person who put him away. It had the effect of feeling as though there really were other stories going on in this game, ones that I wasn't even privy too, and I just thought that was the coolest, most immersive thing ever.