Inconvenient Headphones

I'm gonna crank my volume up to 110% so I REALLY can't hear you!

When someone has headphones on or eabuds in and can't hear anyone who might need their attention. The most common instance of this UnTrash being plays is when a Janitor is cleaning the school he works in while three students are, for instance, trapped in a locked closet at night and the janitor is their only hope of getting out before morning. They can cry out for the Janitor to unlock the door all they want, but his music makes then inaudible.