How Black Adam's Most Surprising Cameo Came Together [Exclusive]

If you've seen the movie, you know that Atom Smasher's (comics godfather) uncle Al Pratt is played by none other than 'Happy Days' and 'Barry' actor Henry Winkler. Al Pratt is the superhero Atom, once a regular student who gained size-changing superpowers. (Rothstein's grandfather is also part of this world as the supervillain Cyclotron.) Atom was a founding member of the JSA in the comics.

Garcia told /Film that over the various iterations of the film over the years, they carefully worked out how much backstory they could give to the characters they chose to use. He said:

"...we wanted to have a little moment where we recognized this relative of Atom Smasher who was an original part of the JSA and has a history with Noah. So we wanted to find someone who would excite the fans, which was lovely and fun, and Henry [Winkler] came in and just crushed it. We only had it for a little while, but he went, he recorded this stuff, it plays so well with Noah, Noah is so engaging, and you love watching him on screen. We were so happy with how that scene turned out, and it was just enough to give a good piece of history and also add the stakes for Smasher."

It's a touching moment, where you can see how much Atom Smasher wants to live up to his family history. The good side, anyway.