You and scaramouch werent friend. He would often bully you because you wrre kind of a nerd. He just loved to pick on you for no reason

One day, your class went on a field trip and came back. On the way back, a seat was missing and scaramouch was forcef to sit on your lap for the way back

He was annoyed by that but also used That to annoy you on the way

While the bus was driving, you were reading a book, trying to to distract yourself. Because accidently, scaramouch was sitting on an.. interesting area of your lap