Revealing mistake: When Frank drops his helmet into the machinery below him, cogwheels start flying. Then it cuts to a closeup of Frank and a cogwheel suddenly strikes the roof right in front of him. However it is obvious that the cogwheel comes through the roof from above and not from the machinery below. (00:15:05)
Revealing mistake: About half an hour into the movie, when Frank is in the tank, he plows into a supposedly concrete zoo wall, which wobbles. Also, the wall splinters where it meets the sidewalk, revealing that the "wall" is actually a wood prop, and a flimsy one at that. Five seconds later, when people and animals are shown running out, the same wall is shown with a different shaped hole and pieces of concrete lying around it. Apparently the concrete pieces aren't too real either, as the camel kicks one around as easy as if it were made of foam. (00:30:25)
Revealing mistake: When Frank and Hector are fighting near the fire hose, Frank is pushed into the wall. It wobbles.
Answer: The foot pedal controls the speed of the wheel. Frank puts his foot on top of Jane's foot and pushes the pedal down all the way. The rapid acceleration and the fact they took their hands off the clay caused it to go everywhere.
Bishop73
Wouldn't that hurt Jane as Frank's foot is applying pressure to hers while pressing down on the pedal?
Not really, you can see his foot gently presses on top of hers, and both their feet cause the pedal to slope towards the floor, which would decrease the amount of pressure Frank's foot applies to Jane's. On top of that, different people have different pain thresholds.
Phaneron
This is not exactly related to the question asked, but part of the scene that I could never really figure out. It showed that Jane made something in the shape of a square out of a piece of clay. What did she make and how could she have made it in only seconds with her eyes closed? I also don't quite understand how the clay could've possibly gotten to where she obtained it to begin with (asking in a way of abiding by the guidelines).
The scene cuts to them shaping clay without showing any of the set up. So we don't see how it got to that point, so she didn't do it in a second with her eyes closed. It's just a parody of the scene from "Ghost." In real life, using a clay wheel makes shaping clay faster, although it takes practice. If you put your hand, or a tool, on top and press down, you create a hole (which we aren't shown). It looks like Jane is just making a vase.
Bishop73
I really apologize, but I was referring to after the vase was inadvertently destroyed. It was after Frank apparently had a bodybuilder's physique (which was an obvious body double joke). Then it showed Jane making something out of clay in such a short time with her eyes closed. So sorry about that. Thank you for the reply.
The fact she made it so quickly was a gag, but she makes an ashtray. I would say the joke about that is people will often smoke after sex (or there's a perceived joke they do). It seems the clay comes off Frank's body, like it was there when the clay went everywhere.
Bishop73
Thank you very much. Yes, I never could get that part of the joke no matter how many times I have watched it. Thanks again for the help.