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Teenager has testicle amputated after 'tapping' game | News.com.au
David Gibbons, 14, was changing classes in his Crosby high school when he was attacked by another student playing a game called "sack tapping".
"It's just gotten way out of control," said Dr Scott Wheeler, a urologist in Brainerd, Minnesota who says he performs three to four surgeries a year on boys with ruptured testicles and other complications as a result of "sack tapping".