After Julie's air hose is cut her swimsuit changes from red to black. When she surfaces it is red again.
Shadows of cameraman and boom mike reflected on a bush and a tree when the Angels all chase Blackie and Chin before their way is blocked by a truck.
When the three men first exit the Asian restaurant the reflection of the camera and operator are visible in the glass on the right.
The characters portrayed by Sonny Bono and Anne Francis are referred to as Marvin and Cindy Barton, respectively. In the end credits, they are listed as Walrus and Cindy Lee, respectively.