What are funny ideas for t-shirts for the Harry Potter and the Deathly Hallows premier?

I have been a huge fan of the Harry Potter franchise and am awaiting
the premier of the 8th movie. I was looking for funny ideas for things
to put on a shirt to wear to the midnight premier. An example of a
shirt I saw was "my magic wand is 11 3/4'' ". Please help me out and
give me funny ideas!