High School Musical - You Already Closed It!
At the time when Gabriella and Taylor send the code to mess with the electrical wiring in the gym:
They send the code, and then the screen returns to the "starting state" (the empty text box with the "send" button). Then you will see Taylor close the laptop. Then it will cut to the gym, and show the scoreboard start to change and such, and the lights dim. But then it will cut to Taylor and Gabriella at the scolastic decathalon again, and the laptop will be open, and you see taylor looking around and close it, like she just sent the code, just like she did before!