Here is a thread to post some the ridiculous, funny, random, or whatever things you have witnessed the AI doing...inspired by the following event...

I entered Riften with my new character and an Imperial Courier entered the town with me, a Riften Guard then attacked the courier and killed him. Maul, Brynjolf, and Sapphire attacked and killed the guard. Then the other guards retaliated against the three and by the time it was done, there were guard bodies everywhere while Maul and Sapphire were on their knees. Brynjolf standing proud over like 4 guard bodies.

Needless to say I sat and watched the hole thing unfold laughing as it happened. Sadly I reloaded because several random civilians got caught in the crossfire and were killed and also Maven Black Briar had gotten beaten senseless and had taken a knee.

Good times...

as i walked into Ivarstead , three leagioners and there presnor were attacked by the guard,,,,i watched the guard killed all the leagon
iwent up to high hrothgae talked to the Gray Beards and came back to Ivarstead to so the guards now fighting 5 stormcloaks....
The Stormcloaks won and walked away.

I'm sorry I can't think of my own to add at the moment (other than NPCs trying to fight dragons with their fists), but I just wanted to say that your OP was hilarious.