Mime

It's a well-established tradition for me to do something unexpected to "liven up" my final exam each year at McMaster.
Antics from previous years included going dressed in a bathrobe with a bubble pipe (as in my alternative grad photo), and showing up dressed as Santa Claus so as to hand out F's to people.
Not to be outdone in this, my final year, I paid my respects to the university by showing up fully costumed as a mime.