Teacher requests help with projector. I go to the classroom.

Me: What seems to be the problem?
Teacher: Yes, I just can’t get this projector to show image from the computer! I’ve hit every single button on the remote!
Me: .. The computer isn’t on?
Teacher: Huh?
Me: There is no power on the computer? Have you turned it on?
Teacher: .. What?

I thought maybe she had accidentally shutdown the PC, but no. She had just walked to the classroom and just turned on the projector.. Didn’t even touch the computer..

Heard the students snickering when I left the classroom.