The other day at my school, I had a study hall. During it, my friend walks up to me with a permanent marker and he says "Do you want to join the Pen-15 club?" I think for a second, and say "Yeah, whatever". So he told me to look away while he drew the "secret club emblem" on the back of my hand. So I did. It was after he had finished drawing, yet before I looked at what he drew, when I realized what mistake I had made. I looked at my hand, which now said "Pen15" on it, looking like the word "Peni[size=0]...[/size]s". I was so mad at him lol. I ran to the bathroom to wash it off. Unfortunately, it was still sort of visible, and since it was permanent, I had to rub really hard. Because of this, it looked like I had a hickey on my hand. I needed to wear my sweatshirt sleeve over my hand all day, and try to cover it when raising my hand. lol
Try it on your friends, it might work.
And post your pranks here too, mb

I've already posted P-P-P-Powerbook here.