These blogs rock!
Add this one, I thought it was hilarious when my brother told me:
Bring a McDonald's Happy Kid's Meal box filled with french fries. Then, as people walk by, throw a fry at them and say, "Bah da bah bah bah, LOVE IT ALREADY!" and run to the next aisle.
And maybe this one too:
Grab some Sunny D bottles (full) and throw them at people, screaming, "TASTE THE POWER OF THE SUN!"