A theorem about this activity, which states that the quantity F plus D over quantity V plus D equals B over H, was put forth by enthusiast Claude Shannon, who automated this activity (15[1])using an Erector Set. Rubenstein’s Revenge and Mills’ Mess are among the patterns in this activity (15[1]-5[1])that can be represented using Siteswap notation. It’s not sword-swallowing, but the early 19th century English celebrity Ramo Samee inspired a William Hazlitt essay about this activity’s (*) “Indian” performers. Paul Cinquevalli was one of the first “gentleman” performers of this activity, who used cigars, bottles, and umbrellas in music halls. Beginners to this activity may learn how to perform cascades with odd numbers of props. Bowling pin-shaped clubs are used in, for 10 points, what activity, in which multiple objects are thrown and caught continuously? ■END■ (10[1])