Actor Hugh Jackman’s naked butt makes an appearance in the latest installment of the X-Men series, X-Men: Days of Future Past. While the casual moviegoer was probably okay seeing Jackman’s backside, his kids were traumatized.

“Watching the movie with my daughter […] of course I forgot about that scene,” Jackman told MTV News. “And I forgot what it’s like, and she was like ‘Oh dad, gross.’”

His son was too grossed out to even speak about it.

“My son was watching with six of his mates,” Jackman said. “He’s 13, almost 14, he just can’t even talk about that.”

According to Entertainment Weekly, X-Men: Days of Future Past is off to a stellar start at the box office, earning an estimated $36 million on Friday. Forbes notes that the movie’s Friday is the third largest of the year, behind Captain America: The Winter Soldier and Godzilla, which earned $38.4 million last weekend.

Will you be going out to see the new X-Men movie over Memorial Day weekend?