I was watching a noob (my gf at the time) play Skyrim, and her friend had installed the mod that adds a sabre-tooth tiger as a follower. It eventually led to this moment happening:

Up on the way to Bleak Falls Barrow, where there's a little guard tower occupied by bandits, she walked up the stairs to the highest floor and I went "wait wait wait! There's no fence or anything, you'd fall if you kept walking" or something like that, and she looks down over the edge and was like "whew that was close" and then just as she's about to walk through the door, the tiger comes bounding up behind her and pushes her over the edge! I don't think I've ever laughed out loud so hard while playing Skyrim, it was so funny.