The Gang Goes Bowling - S16-E7
Continuity mistake: The score for the boys doesn't match what we see. For example, Mac's first roll was a 7, but the score shows 8. And Dennis gets a strike, but the score shows spare. Later, when the girls trick the boys into performing badly, none of that is reflected in the scores. At some point after the 6th frame, Mac and Charlie roll gutter balls multiple times, and each on the first roll at least once, none of which is in the scores.