Big Jake (1971)

Continuity mistake: In the scene where John Wayne picks up the red box of money he lifts it onto his back and walks to an open door. As he goes out the door the camera moves to outside and we see John Wayne come out of the building. Now the red box is completely on his shoulder, rather than his back.

Jacob 'Big Jake' McCandles: And now you understand. Anything goes wrong, anything at all... your fault, my fault, nobody's fault... it won't matter - I'm gonna blow your head off. It's as simple as that. No matter what else happens, no matter who gets killed I'm gonna blow your head off.

Question: Where were the cans for fuel for the automobiles?