Jimmy Kimmel had the chance to see K. Trevor Wilson perform stand-up comedy last summer when Kimmel judged the Roast Battle competition live from Montreal’s Just For Laughs for Comedy Central. Wilson didn’t win that competition, but a slot on Jimmy Kimmel Live to kick off 2017 isn’t a bad consolation prize, either. Wilson explained the distinct difference between Scientology and Christian Scientists, and he has plenty of roast jokes at his own expense.

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Wilson also explained to Kimmel what the K. in K. Trevor stands for and why.