Zed Grimfood and Redarse Moody once enchanted Snipe's teapot so only coffee came out. Every time Snipe made tea it always came out as coffee. Bumblemore decided that if Snipe couldent even make tea then he was unfit to be the Potions master. This is how Snipe got demoted to professor of Notions. Snipe got his revenge by cursing Zed with transparent pixies while Redarse denied having anything to do with the teapot.