The human cannonball is a performance in which a person (the "cannonball") is ejected from a specially designed cannon. The impetus is provided not by gunpowder, but by either a spring or jet of compressed air. In a circus performance, gunpowder may be used to provide visual and auditory effects, but this is unrelated to the launching mechanism. Fireworks and smoke may also be used to increase the visual effect.
The human cannonball lands on a horizontal net or inflated bag, the placement of which is determined by classical mechanics. Outdoor performances may also aim at a body of water.
Read more about Human Cannonball: History, World Record, Risk
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—William Morris (1834–1896)