One of the more head-scratching gags of Craig Gillespie’s Supergirl features an alien slug that produces popcorn out of his rear—and I have tried it.
Supergirl features Milly Alcock as the titular hero, as well as Eve Ridley, Matthias Schoenaerts, David Krumholtz, Emily Beecham, Jason Momoa, and David Corenswet. The DC Universe film sees her on a journey to save her dog, Krypto, after he is poisoned by Krem of the Yellow Hills (Schoenaerts). She is joined by Ruthye Marye Knoll (Ridley), a young girl seeking to avenge her family after they were murdered by Krem. One location they visit along their quest is an intergalactic rest stop where they encounter the slug and partake of his popcorn.
In April of 2025, I flew out to London to visit the set of Supergirl at Warner Bros Studios Leavesden. While I was there, I had the opportunity to explore the worlds of the film, get up close and personal with the props, screen footage early, and chat with some of the cast and crew. However, one of the bigger highlights of being on set for Supergirl was meeting the slug, named Cedric, and eating his waste.
I Ate The Alien Slug Popcorn On The Set of Supergirl
Now, of course, Cedric is not a real alien, and the popcorn is not real excrement. He is an animatronic controlled via remote by his creator. The creature, produced entirely as a practical effect, was remarkably lifelike in person. We met at the intergalactic rest stop on my way to the prop department. There, craft services had prepared some alien snacks to taste test, including the “poopcorn.”
Its flavor was atypical compared to usual popcorn. I would describe it as spicy yet sweet. The popcorn is red orange in person. It is caramelized but also has a real kick that sneaks up on you. I imagine eating a whole serving at once would cause that spicy flavor to build. I was given a bag to take home that featured alien writing I have yet to translate on it—a bag that is currently sitting next to my laptop as I type.
In addition to that feast which Cedric produced, I also tried an alien eyeball. The texture was gooey, and in case you didn’t know, eyeballs are rather fruity. The craft services staff revealed that these snacks were actually what Alcock and Ridley ate while filming their scenes at the rest stop.
Supergirl’s Alien Slug Gag Is Actually A Testament To The Film’s Use Of Practical Effects
Silly as it may be, the practical effects and culinary work put into making Cedric were genuinely impressive. Many films would have considered making the gag character computer generated, but the Supergirl production team went the extra mile.
The prop department also did the same when creating the replica of Krypto after being poisoned. While Krypto appears to have been touched up in post-production, there was a lifelike double that Charlie Horwood, the action prop supervisor, described as the most expensive prop created for the film. In person, one could be convinced they were looking at an actual dog.
Between Krypto, Cedric, and the other alien oddities created for the film, Supergirl features some amazing work from crew members who do not always get the shoutout that they deserve. Their hard work often makes the difference in how immersive a film is for its audience; how much Supergirl feels like a cosmic journey in large part rests on their work. After all, what is more alien than eating popcorn from the bowels of a slug?
Supergirl is now playing in theaters worldwide.
Supergirl
6/10
- Release Date
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June 26, 2026
- Runtime
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108 minutes
- Director
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Craig Gillespie
- Writers
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Ana Nogueira
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