I didn;t do this but my friend did.
One thing he did is make a paintbrush ladder to the top of White-Gold tower and jumped out of the Imp city. Then he just ran and ran out of Cyrodill completely. If you see his map (he saved it) he is in an ocean where Skyrim is supposed to be.
He also jumped off his paintbrush ladder and went underneath the ground. He then commenced killing everyone he could and none of them could kill him. It was quite funny.
One thing I did is made a spell that decreases my fatigue and I jump around until my fatigue is really low. Then I cast the spell and it makes my guy fall. I love to do this over flowerbeds and especially off of High Rock.
I also saw two deadra fighting one time, quite funny.
Courtesy of Lycanthrope
Proudly paired with: Blazin Torchic- No longer. He is banned.