Continuity mistake: In the scene where Tracy first goes to detention and meets Seaweed, when Seaweed says, "Well this is something for you," and then he introduces himself, look on the floor behind him. You can see crinkled up paper balls on the floor that throughout the entire scene move spots, and you never see anybody pick all of them up. For example, watch when Seaweed is dancing and his foot touchs a ball and it gets tossed aside and magically disappears.
Continuity mistake: At the end of "You Can't Stop the Beat," the first angle is of Tracy and Link, and then Penny and Seaweed come down a space that the Dancers make them. At one point the Dancers are almost up and then in the next shot, the Dancers are bent down and are coming up again.
Add timeMichael Piscitelli
Continuity mistake: When Seaweed sings "Run and Tell That", he is singing to Penny, "And then there's those who try to help God knows." When the camera is facing her, Penny is shown looking very stiff, as if she wasn't dancing (or couldn't get into the groove). When the camera is over her shoulder, showing Seaweed, she is dancing. The next shot of Penny she is not dancing again.
Continuity mistake: At the beginning when Tracy hasn't even been shown yet, you see some people pulling open a window gate, and the window has a new sign and a couple sale signs on it. Later in the film, when Tracy is singing 'Good Morning Baltimore', she passes by the same place. Only this time the window gate is closed again. (She leans up against it and grabs it.)