Hehe, this was a project I did back in 1996 with the help of some of my sister's friends!!
I wanted an MGM-style opening for my school projects, and thought it would be funny to have my cow halloween costume mask on. When that looked stupid, I opted for filming me instead, roaring and biting the edges of the MGM frame.
We didn't have any markers or anything, so it was a total guess as to where the frame edges actually were - that's why I keep biting randomly into the air. :)