I have a new one here... Your best ideas for pranks.

Some of my favorites:

Replace Baby Jesus with a Black Cabbage Patch Kid in a nativity scene.

Replace the Bibles with Satanic ones before service.

Write something on yourself before a Holy Water baptism with cinnamon oil. Scream as the Holy Water touches you, and laugh as the messages appear.

During the wedding ceremony, wrap a chain around the groom's neck with a cow bell on it. Lock it with a combination lock. Then tell him he has to call you on his honeymoon to get the combination to unlock it

While in service at church, release three mice while nobody is looking. Write the numbers 1, 2, and 4 on the backs of these mice. Church officials will be scrambling all day to find that number 3 mouse that doesn't exist.

Impress your friend and tell him how you can balance 2 cups of liquid on your hands (palms down). Then bet him that he cannot do it. When he tries to do it, offer to help him...once he gets it and balances the cups, walk out of the room and leave him to figure out how to remove cups from back of hands.

Glue cafeteria glasses to the bottom of a table at school.