Continuity mistake: When Cliff and Peevey first test the rocket pack by strapping it to a statue, the statue skids across the ground and crashes into a small mound of dirt on the otherwise completely flat field. But when they run over to collect the pack, the mound is gone and the statue is lying in a crater, as if it had hit the ground from a much steeper angle.
Question: Why in the world would Lothar's tether be long enough for him to slam into the gondola at the bottom of the Zepplin? If the Hindenberg is 135 feet at it's widest point, half the circumference of a cross section is ~212 feet. Even if it was a Goodyear blimp (50 feet), the cable would have to be at least ~78 feet in length. That is really long. Also, what is Lothar made of to survive that kind of impact?