Deliberate mistake: At graduation, after Troy is handed the diploma, in the overhead shot the graduates on the left and right stand-up from their seats, then turn and walk towards each other. All their seats simply disappear between shots. Obviously done deliberately for the dance sequence, but a mistake nonetheless.

High School Musical 3: Senior Year (2008)
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Directed by: Kenny Ortega
Starring: Zac Efron, Vanessa Hudgens, Ashley Tisdale, Lucas Grabeel
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Chad Danforth: So I guess when they hand us that diploma, we're actually done here.
Troy Bolton: What makes you think we're getting diplomas?
Trivia: Stan Ellsworth, who briefly plays big, burly Mr. Riley, has an interesting personal history that is hardly known. After high school, he was in the US Marine Corp for eight years, and was honorably discharged with the rank of First Sergeant. Then after receiving a BA in history, Stan played for the NFL's Detroit Lions and the Seattle Seahawks, but after an injury he became a coach and defensive coordinator. Some years later Stan went back to school and received a PhD in Sports Psychology and a Masters degree in Organizational Communication. Doctor Stan Ellsworth (remember the PhD), has also taught history to Highland High School students in Salt Lake City, Utah.
Question: When Troy goes to the gym at night he looks at the basketball jerseys (there are 6 I think), one is Troy's, one Chad's and another Jack Bolton's. Who do the others belong to?





Answer: I think that they are just props. The owner of those jerseys has no relevence to the plot.. They might just be randomly picked names.