Continuity: There is a scene at an airport where Mel Brooks is approached by a man claiming to be a FBI agent or something like that. In the next shot inside the bathroom you can see the boom microphone from the top of the screen.

Other: In the scene where Mel Brooks is singing the song "High Anxiety" to a bunch of people in a dinner room. Near the end of the song he sings almost 2 words and his mouth is clearly not moving.

Continuity: Madeline Kahn and Mel Brooks are in a hotel room in San Francisco. She is smoking a cigarette which grows shorter as the scene progresses. After cutting away and then back to her, the cigarette is long again.

Revealing: Mel jumps over a step that he senses to be weak. The step he actually jumps onto (and collapses) has been pre-cut in a zig-zag pattern.

Continuity: In the scene where the doctors are trying to save the patient from being killed, Mel Brooks runs up a long flight of steps in the clock tower. But, during his climb, he saw that there was a step which was cracked, so he avoided it by jumping over it. When he landed on the step above it, he fell through. While he was dangling from a step, you can see that the one that he jumped over is no longer cracked.