Lady Gaga threw her shoe at the dancers on So You Think You Can Dance, which she claimed is some crazy tradition when you really enjoy a dance performance. Okay, what? I have performed in many dance shows, seen many dance shows, but never have I ever seen anyone throw their shoes at a performer! Especially heel-less, 12-inch platforms that probably weigh a ton. Luckily, no one was hurt.
What I'm saying is, when you really enjoy a dance performance, applaud. Don't throw your shoes! Safety of self and sanctity of shoe above all!