- "He then pointed his wand at it and muttered, "Imperio!" The spider leapt from Moody's hand on a fine thread of silk and began to swing backward and forward as though on a trapeze. It stretched out its legs rigidly, then did a back flip, breaking the thread and landing on the desk, where it began to cartwheel in circles. Moody jerked his wand, and the spider rose onto two of its hind legs and went into what was unmistakably a tap dance."
- —Alastor Moody controlling a spider.[src]
With the Imperius Curse (Imperio) one can make people do things they don't want to do, though they will lose all conscience and self-identity and can find no reason to deny what is being asked of them. However, a strong-willed person can resist the curse; one notable example of this is Harry Potter.