The teachers in your school were frustrated to see doodles on blackboards and funny paintings on wall, made by spray paint. No one suspected that it was you since you were a well-mannered top student.

when school was over, you enter an empty classroom and begin to draw funny doodles of teachers; You drop your chalk so you turn around to pick it up and..

to your shock, your math teacher was watching you with a smirk. He was standing there the whole time!

"So it was you huh.."