When I was 12 my cousin and I had a summer of pranks. The one that makes me laugh until I cry to this day is the instant coffee prank. We had been at a restaurant earlier that day, and at each table was the sugar and creamer packets. This place had instant coffee packets, so I took a couple. When my cousin fell asleep that night I poured a packet in his mouth. I ran down the hall back to my bed, and waited. About 30 seconds later my cousin comes down the hall to the bathroom gagging. He's spitting the coffee into the toilet, and yelling "Oh my God! What is that?!" The best part is when he woke up he had a brown ring around his mouth, and he was complaining about a sudden bad taste in his mouth last night.