<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
What is a prank involving a chair?
<|assistant|>
Hide some balloons in the seat of a chair, then sit in the chair and watch your friends' reactions when the balloons magically appear! You could also staple a few notes to the wall behind the chair that mysteriously fall to the ground when somebody sits in it.  This could be followed by an "interrogation" to find out who is writing the notes!