Where to start? I use the damn things as my shows' bgm all the time.
First, there's the obvious Pythonesque suggestion: Liberty Bell March - John Philip Sousa
You could stick to the classics: Galop [with one 'l'] - Dmitri Kabalevsky
Go with something actually weird: Katamari March Damacy - Yu Miyake
Or just stick with what works: Popcorn - Hot Butter
Maybe creep everyone out if you're in the mood: Hideosity - MOSAIC.WAV (Susumu Kayamori)
I added enough OSTs that you'll never run out of instrumentals.