The most recent glitch I remember is from X-MEN Legends II - Rise of Apocalypse. Using Jean Grey, I was levatating above the city. Normally there is a limit to how high you can go, but for some reason (possibly due to the elevated train rails nearby) I was able to go higher than normal. I kept rising until I could barely see the city as only a small patch below. I wasn't able to go lower, only higher and eventually had to restart the game. I lost everything since the last save, but I found it interesting and tried several times to repeat it but never could. It makes me wonder how it could have happened in the first place unless it was rendered that way by the game developers?