Multiple choice general knowledge If you want to make your opponent dance non- stop, you say... rictusempra mobiliarbus serpensortia tarantallegra Reveal answer Fill a bubble to check yourself D Correct answer Explanation Tarantallegra is the Dancing Feet Spell that forces the victim's legs to start dancing uncontrollably. Rictusempra is the Tickling Charm, mobiliarbus is used to move objects, and serpensortia conjures a snake.