Professor Boggart Snape™

The elusive, shape-shifting Boggart assumes the form of whatever most frightens the person who encounters it. To defeat it, one must use the Riddikulus charm while imagining the Boggart in an extremely funny form–such as when Neville envisioned one in a Hogwarts wardrobe to be Professor Snape dressed like his grandmother, complete with her fur stole and stuffed vulture hat. Laughing aloud ultimately makes the Boggart disappear.