Photo: Brian Doben

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7. Zorbing
As a kid, you tossed around a giant plastic beach ball. As an adult, you can climb into one. Meet Zorbing, the newest way to let your life flash before your eyes and have a blast doing it. Imagine a clear plastic blob tumbling down a hill while you ping around inside like a tennis ball in a dryer. Insane? Maybe. But definitely a way to get out of your comfort zone—way, way out.