I was in a computer shop with my friend. He bought a coffee-2-go and when he drank it, before we came in, he gave the cup to me. I didn't have anywhere to throw it, so I made it into a ball like shape and held onto it. When we entered and he finally bought what he came for, I sneaked up and put the cup in his hood. I just disappeared and watched from a distance. One of the clerks mentioned he had thrash in his hood and he just looked up and said: "You a**hole"
I never had such a laugh process in my life. From schoolgirl giggling to a violent maniac laugh.