Jaws (1975)
Spielberg on the set with star Roy Scheider. For many, it's still not safe to go into the water following the suspense of this film. Spielberg chalked much of the tension to his need to improvise on the set.
"When my mechanical shark was being repaired and I had to shoot something, I had to make the water scary. I relied on the audience's imagination, aided by where I put the camera. Today, it would be a digital shark," Spielberg remarked.