<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
What is a gross prank I can pray on my friend?
<|assistant|>
Perhaps an embarrassing public prank is what you are looking for. You could organize a group of friends to surround your friend and burst out laughing unexpectedly whenever he/she tries to speak. Or you can hide some brightly-colored silly string in your friend's bag and set a timer to have it release all at once while they're in class! If you're feeling especially crafty, you can build a contraption that looks like it's doing science experiments but actually just dispenses candy each time your friend walks by.