Why Did He Do This?

Today was good except for this small incident. After recess, Shubha went off with Sulagno to South City Mall (I think so... hehe!) and Sola went off to watch "Rock on!" with her boyfriend (he's a senior). Me and Mona stayed back to attend AS sir's class (Maths teacher, he teaches probability, and half the students prefer not doing his classes, well... actually more than half the students!) along with a few others. I was silently sketching some faces on a piece of paper which had other face-sketches as well. I do that most of the time, drawing faces to see which will suit which character of the stories I have thought of. Well, this paper had two good sketches and I was applying pencil-shades to one of them. Suddenly this guy, Sailender, came, got hold of the edge of the paper and tore it clean off! I got to my feet and hurled a handful of insults at him, but then, there was nothing I could do to repair the damage... I threw it away and didn't say anything. But I felt as if the characters got murdered or something. Why did he have to do that? Tearing off my imagination into two! This was one of the meanest things anybody has done to me... that also, without any reason.