Continuity mistake: While Bud is lying on his porch, reading the book, Dr. Murdock shows up. In the closeup, facing Bud, he reaches out to Murdock with his right arm, but it cuts to the next shot and it's Bud's left arm outstretched.
Continuity mistake: After Bud tells Porter that Dan is out dynamiting alone, it then cuts back to Dan deep underwater, and when the nitrogen narcosis hits, both of his scuba fins fall off and then inexplicably reappear in following shots.
