“Real Steel,” out Friday, has Hugh Jackman teaching robots to fight. Someone must have incriminating photos of him, because why else would a good actor star in a big-screen Rock ’Em Sock ’Em Robots? But he’s not the first talented actor to make an odd film choice.

Dennis Hopper in “Super Mario Brothers” (1993): Why Hopper thought “King Koopa” would be a worthy addition to his resume is a bigger mystery than anything in “Blue Velvet.”

Jeremy Irons in “Dungeons & Dragons” (2000): It’s a bad idea to make fun of D&D — those guys who played the game in high school now run the world. But even the most capable dungeon master has to admit that Irons, as Profion, took some hits to his awesome points.

Michael Caine in “Jaws: The Revenge” (1987): Caine couldn’t accept his Oscar for “Hannah and Her Sisters” because he was busy shooting this clunker. Perhaps his rule is: When someone offers you work in the Bahamas, you take it.

Robert De Niro in “The Adventures of Rocky and Bullwinkle” (2000): He has kids, so maybe that’s why De Niro took the role of “Fearless Leader.” Or maybe he just always wanted to work with a moose and squirrel.

The Cast of “Gigli” (2003): Ben Affleck, Al Pacino and Christopher Walken have three Oscars and eight noms between them, and they’re all in a film whose title quickly became shorthand for “worst movie ever.”