My brother killed a dragon, but he couldn't absorb his soul for some reason.
As for myself, I was doing the Pelagius quest because Sheogorath is awesome, and the sultry maiden that appeared when you use your Wabbajack on the Hagraven would speak with a deep man's voice. I was also able to punch Pelagius the Tormented with my free hand, at which point he got up, said a line, and then went back to sleep. I think those two are easy to reproduce.
Also, kinda off-topic, but do you know who voices Mario- I mean Paarthunax?