"Impossible trick" may refer to:
- Francis Brunn's "impossible trick": Spin a ball on your finger, drop another ball down from the back of your neck, kick back it up behind your back, and catch it on top of the spinning ball.
- Bar Mualem's "thoroughly impossible trick": Juggle 5 balls overhead, catch and throw each ball behind the back once, and then go back to overhead throws.
- Thomas Wood's "mathematically impossible juggling pattern" (so called because some friends of the pattern's inventor were unable to figure out how to correctly describe it mathematically): Shuffle beat, basic throw, chop, basic throw, repeat on the other side.
- Impossible siteswaps: Patterns written in siteswap notation that are theoretically valid, but actually impossible to juggle (see Impossible Siteswap Animator).