Mr. Bean - S04 Episode 17 - Back to School (3)

Mr. Bean comes out of his car and buys a carton of milk from the grocery store. However, when he goes back to his car, the head master of the school mistakes him for a new teacher, and brings Mr. Bean to a classroom full of delinquent students, locking the door behind him. He tries to leave, but is unable to do so. The students start throwing things at him, so he hides under the desk. A boy throws a duster on him, causing his face to be covered in chalk. The boy offers Mr. Bean his handkerchief so he can wipe his face, but it turned out to be a prank as Mr. Bean's face is now also covered in blue paint.