If you end up at a R E M fair dimension

You step through the whirling colors of the reality rip. When you set your feet on the ground on the other side you see a armored horse about to hit you at full gallop. You jump to the right and the side of the animal buffets you into the ground hard. You seem to have landed in a feudal time. "Guards arrest that man!", The king screams. Rough hands drag you to a dungeon. You are accused of witchcraft for suddenly appearing in the middle of a joust.