Visible crew/equipment: In the scene of the funeral for Arnold's wife and son, we hear the sounds of "Amazing Grace" being played on the bagpipes. There is a bagpiper in the distance, as the hymn goes on the piper can be seen blowing up his pipes and setting them under his arm without missing a note, which is physically impossible. When the camera pans to the gravesite, there is a second bagpiper in the foreground. He does the same exact thing, he blows up his pipes and sets them under his arm mid-tune with out missing a beat. When playing the bagpipes, you must fill the bag up with a certain amount of air to make the drones (the three pipes that come out of the bag and rest on the piper's shoulder) sound. You must then blow more air into the pipes to sound the chanter and play a tune. You cannot do what the bagpipers in this movie were doing and still play the tune.
Collateral Damage (2002)
1 visible crew/equipment mistake - chronological order
Directed by: Andrew Davis
Starring: John Leguizamo, Arnold Schwarzenegger, John Turturro, Elias Koteas, Cliff Curtis, Francesca Neri
Plot hole: The drug dealer guy gives Arnie a hood to wear so as to not see where they were going. When he puts it on we can see his face through it like a streched sock or something, meaning he could still see.
Gordon Brewer: Hey, sell me your pass so I can work the zone.
Armstrong: Would you stick a sock in it "Jolly Green"? I'm just a wrench for hire.
Trivia: Notice that John Leguizamo said that Arnold was working like a cyborg. Of course, he was a cyborg in the Terminator series.