Rodolphus was messing around with his friends. They had found a group of second years, a group of mudbloods as they called them, and started to do.. not so nice things. It had only started with some mocking, then it turned into full bullying. They cornered them and pushed them around, messing up their things and pulling at their robes to make them fall. What only started as simply mocking turned out to be full on emotional and physical abuse, going to the point of pointing their wands at them.