Wrong room!

Squueeeeeek!

I wonder if there exists a physics law (with a fancy name ofcourse), that explains the unnatural spike in the acoustic ability of a door-hinge, in the event of your entering a wrong room! While the hinges tend to be mild on occasions that your entering the right room, they do nevertheless hit an insanely high note when you have goofed up. So there I was, standing dumb, facing a room full of we-are-all-so-important people staring right at me.