Revealing mistake: When Clint Eastwood and Jeff Bridges are being chased by George Kennedy and his partner, Bridges is driving off the dirt road down and embankment and you can clearly see that in the passenger seat is a faceless dummy instead of Eastwood or another stunt man.
Thunderbolt and Lightfoot (1974)
1 revealing mistake - chronological order
Directed by: Michael Cimino
Starring: Clint Eastwood, Jeff Bridges, Gary Busey, George Kennedy, Geoffrey Lewis, Catherine Bach
Continuity mistake: In the scene where Thunderbolt and Lightfoot are in the car with the crazy driver. The car goes over the embankment and as it flips you can see a wheel break off. A short time later they both drive off in the same car, with the wheel attached again.
John Doherty: I don't wish to be forward but we'd like to exchange cars with you. So the faster you get out, the better it'll be for your ass.
Question: How did they get the 20mm cannon? Did they buy it legitimately, or obtain it by deception?
Answer: Since the crate was labelled machine parts, I'm guessing fraudulently.