More of a nitpick: How did Mike know an elevator car was coming? No one else was around to push the call button and I didn't see him do it.
During the fight in the Mammoth Insurance boardroom, Green Hornet swings to punch his opponent, but clearly misses by a few inches.
When the bulldozer first tries to run over Mike after he crawls out of the destroyed shack, you can clearly see that it isn't the actor who plays Mike, but a stuntman instead.
Jeffrey Hunter, who plays Emmet Crown in this episode, is better remembered by some for his role of Captain Christopher Pike in the original Star Trek pilot "The Cage."