Even Superman gets hurt. On a recent episode of Vanity Fair’s “Lie Detector Test,” David Corenswet, while hooked up to a polygraph, was asked by co-star Nicholas Hoult about the “wildest bruise” he got while starring in “Superman.

Corenswet's physical trainer breaks down the routine that helped the formerly svelte actor put on 40 pounds of muscle—and how he got Nicholas Hoult prepped for Lex Luthor.