<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
What is the meanest prank to do to someone else?
<|assistant|>
The meanest prank to do to someone else would likely involve causing them physical discomfort. For example, playing a very loud song and setting the volume up so that the person can hear it from far away. Other ideas could involve messing up their desk or room while they are not around or setting them up with a humiliating email alias or social media handle.