Continuity mistake: At Riley's Garage, when Troy and Chad are about to rummage through the junk looking for the radiator cap, Troy raises his arms and his boxers are light grey, but next shot when he lifts the truck's hood his boxers are black. It's also noteworthy to mention that during "Boys Are Back," young Troy is wearing patterned boxers, though all other clothing is identical.Super Grover
Continuity mistake: When Troy surprises Gabriella from behind he pulls her into the treehouse, and as they stand at the center holding hands, behind Gabriella is the brass bell (which is at the doorway they sat in front of earlier) and behind Troy are two model airplanes. In the next two shots as the ceiling opens, though the couple have not moved, now the airplanes are behind Gabriella and the brass bell is behind Troy, but they revert back to their original positions in the final shot inside the treehouse. (00:12:05)Super Grover
Continuity mistake: On the treehouse, when Troy helps Gabriella up during their song, "Chad's" red cape, which is draped to the floor, and Robo Rob are visible behind them on the windowsill. In the next shot as Troy removes his sweatshirt, only a bit of the cape is draped over and the toy has moved farther away from the window's frame. When they turn the corner, we can see that more of the cape is draped on the inside of the treehouse again. (00:11:40)Super Grover
Continuity mistake: In the musical number at graduation, Ryan's shirt un-tucks and re-tucks several times during the dancing.