The iconic movie Jaws is famous for its suspenseful shark scenes and the sudden flashes of a giant fin slicing through the water. However, these buildups weren’t easy to bring to reality. What if the movie’s production was almost sunk by a prank gone wrong?

The little-known behind-the-scenes rumors claim that pranks and malfunctioning props might have caused real-life scares during filming. One such incident involved its director, Steven Spielberg, who traumatized his best friend, George Lucas, on the set.
Steven Spielberg’s Prank on George Lucas Almost Went Terribly Wrong

According to a CinemaBlend article, director Steven Spielberg‘s friend, George Lucas, the creator of Star Wars, a tech enthusiast, and founder of Industrial Light and Magic (ILM), visited the set of Jaws along with Martin Scorsese and John Milius during its pre-production. Curious about the massive shark, Lucas leaned in for a peek right inside its mouth.
Seeing this, Spielberg and the crew couldn’t resist a bit of fun. They quickly shut the shark’s jaws and Lucas’ head was momentarily trapped! Apparently, things got scary when the shark wouldn’t open back, leaving Luke stuck for a while!
Luckily, after a few moments of surprise, they were able to free him. No injuries were reported, but it sounds like things got a bit fishy on the set. There’s a catch, though. This story hasn’t been officially confirmed by Spielberg, Lucas, or anyone directly involved with the film. It exists solely as an anecdote, often cited on movie trivia websites.
Mechanical Failures Enhanced Jaws‘ Suspense and Terror

USA Today reported that creating a scary shark for the movie Jaws wasn’t easy. Special effects crews built three life-size mechanical sharks, but there were many problems. Nicknamed Bruce (collectively) the sharks didn’t work well, especially underwater. The sharks were also made of foam, which soaked up water and made them too heavy.
Because of these problems, the director decided not to show them as much in the movie. Instead, we see quick looks at its fin, hear scary music, and watch how scared the characters get. Even though they couldn’t show the shark much, it ended up making the movie even scarier because we couldn’t see what was lurking in the water!
Jaws is still an amazing movie today, and it’s all thanks to how well they built suspense. The broken shark machines might have been annoying at the time, but they actually forced the director to come up with a new way to film the movie, and it only made Jaws more scarier!
Jaws (1975) is available to watch on Prime Video!
Frequently asked questions
What prank reportedly happened between Steven Spielberg and George Lucas on the set of Jaws?
According to reports, George Lucas visited the Jaws set during pre-production with Martin Scorsese and John Milius and leaned into the mouth of the mechanical shark for a closer look. Spielberg and the crew then reportedly shut the shark’s jaws, briefly trapping Lucas, and the mechanism initially wouldn’t reopen. He was freed after several tense seconds with no injuries, though the story lacks official confirmation.
Why was filming the shark scenes in Jaws so difficult?
The production built three mechanical sharks nicknamed Bruce, but their foam construction absorbed water and became excessively heavy, causing frequent malfunctions, especially underwater. To work around these issues, Spielberg limited the shark’s on-screen appearances, relying instead on quick fin glimpses, tense music, and characters’ frightened reactions to suggest its presence, which heightened suspense.
How did Jaws’ technical problems affect the finished film?
The mechanical shark’s frequent breakdowns forced Spielberg to rely on suggestion rather than direct depiction, showing the shark sparingly through fins, sound design, and reaction shots. Many critics and fans consider this constraint a key reason the film remains such an effective thriller, since the reduced visibility built psychological tension rather than relying on explicit shark visuals.







