Harry Potter and the Deathly Hallows book-release party.
I dressed up as Mad-eye Moody and brought along a ferret I made the night before. I used a clear piece of antennae tubing to levitate it and occasionally a snitch with my wand. It's fun to bounce around a fake ferret while dressed up as Mad-Eye Moody.

This was taken in a mirror, and then digitally mirrored again to be more accurate. My eye is designed to look like it's looking at you at all times!