He gets to his office

He ran through the trees and bushes to avoid being seen. There was a group of girls walking in his direction, but Coach Branson was able to hide behind a tree before being seen. Panting and catching his breath as quietly as possible, he waited for the group to pass before he started running again. His face reddens thinking about how students in the buildings around him can probably see him from the windows… just standing there naked.

He then reaches the office building and enters through the unguarded back entrance. He looks at the clock. He still has 8 minutes left. “Okay, I can do this”, he mutters with a bit more confidence.

No one is in the hallway. He quietly goes up the stairs, while hiding behind the lockers and posts. He reaches the 3rd floor where all the offices are. The other teachers around his office should be in class, so he safely made it to his office door. Feeling a huge wave of relief, Coach Branson sighs. He reaches for the doorknob, and then he realizes… it’s locked.

What does Coach Branson do now?