Oh, I've seen a few. Two really stand out. One was in GTA Vice City where I finished a mission after like a dozen tries. I was so happy! I got into a car to go to my save point. A guy ran up to the car, jumped INSIDE of my character, and started driving all over the city. There was a lot of screaming coming from nowhere, too. It was freaky. I wouldn't reset because, whatever that mission was, it was hard as hell. After a whle, the guy got out of my character and the game resumed like nothing had ever happened.
The other happened pretty recently when I was doing a replay of Gears of War 1. I was at the scene where the Kryll were coming out at night. Anyway, in the middle of a firefight, a car just started shaking. I just looked at it. After a while, it started moving forward. Then, it drove up the wall of a building, started flying, and drove off towards the moon!! My kid and I laughed so hard, I had tears coming out of my eyes. That was totlly unexpected!
