Justin Bieber

A live performance by Justin Bieber on the Germany show Wanna Bet? was canceled after an amateur stuntman was seriously injured during the show's broadcast.

Samuel Koch, 23, was attempting to jump over his father's speeding car Saturday night, but hit the windshield and plummeted to the ground face first. According to The Associated Press, he was taken to the hospital and was in a medically induced coma with a serious spinal injury. Koch underwent surgery Sunday.

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After the accident, Bieber tweeted, "Please pray for Samuel Koch & his family as we wait and hope for his health and safety." Also scheduled to appear on the show was Cameron Diaz and Academy Award winner Christoph Waltz.

Wanna Bet?, which has been running for 29 years, draws more than 10 million viewers and features celebrity interviews, stunts and live musical acts.