Continuity mistake: When Al and Tim are in the bar, watch Tim's and Al's glasses topped with beer foam. In the first shot there is a lot of foam, yet in the very next shot there is no foam.
Visible crew/equipment: During the 21-nail gun salute scene a crew member's head and hand is visible on the left, operating Tim's remote controlled nail gun machine.
Answer: In seasons 1 and 2, each Binford tool had a unique model number, but from season 3 onward, they were all numbered 6100 as a running gag.
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