When all the cigarettes are launched out of the machine and the professor dives for them; there is still a whole hamburger on the plate. But on the next cut when the professor goes back to his seat: there is now only a small bite size piece left on the plate.
When Chuck is talking to Rocky at the lunch counter; Rocky has his right arm up holding a cigarette close to his face and looking at it. But on the next cut his arm is now down and folded over the other arm.
When John Powers is showing the crew the weather map; his right hand is down by his side. But on the next cut; his right hand is now up on the map pointing out the cold snap spot.
When Rocky is dangling from the bridge his arms change orientation several times with each cut.
One should be able to see all the various brands through the glass on a pay machine that dispenses cigarettes. Cliff never pulled the lever therefore all the cigarettes should have still been on display but there were none there. When Cliff finally pulled the lever all the cigarettes came flying out however a standard cigarette machine does not operate in such a manner. Yes the film is a comedy but not a cartoon.
When it's lunch break some of the bridge builders propel themselves to the ground by sliding down a rope. But on the following cut when Rocky and co-worker decide to also slide; they are just holding on to the rope as if they are being lowered down. If they were actually sliding they would not be able to do it at the same pace and also have a conversation.