I didn't keep him as a companion and didn't abuse him before I let him go. I've heard about some videos on youtube about that and haven't looked at them yet.
Spartans, prepare for laughter!
http://www.youtube.com/watch?v=7nLyvG-F4IU
But, yeah. Other than killing him in clever ways, I didn't find much of a use for him. He was damn annoying, though.