Also water up the nose (to the point of asphyxiation) with someone treading on the stomach at the same time, and simulated rape.

“I went looking for the troll because I—I thought I could deal with it on my own—you know, because I’ve read all about them.” Ron dropped his wand. Hermione Granger, telling a downright lie to a teacher? “If they hadn’t found me, I’d be dead now. Harry stuck his wand up its nose and Ron knocked it out with its own club. They didn’t have time to come and fetch anyone. It was about to finish me off when they arrived.” Harry and Ron tried to look as though this story wasn’t new to them.