Getting a sh*tload of praise from a Jarl, having that little smug grin on your face, exiting the Keep and then have a guard putting you back with both feet in virtual reality: "Hands to yourself, sneak-thief!"
Horses falling out of the clear blue sky.. just like that.
Shouting Kyne's peace in Riverwood, and having ALL the cabbages flying all over the place.
My follower getting stuck on one of those gate-traps "It's... nothing", getting up, walking straight onto the same pressure plate: THWAP! "It's..nothing" Yeah.. sometimes I just have my char stand there on the other side, waiting for it to happen again.. just for giggles.
Killing a room full of baddies in a dungeon, to have the very last one stumbling in, tripping over dead bodies, arrows, weapons, slipping in pools of blood "What was that!"
Accidentally stealing a bucket in the Ragged Flagon and the whole damn guild commenting on it "I saw that, you know!" "Hey what'd you do that for!"