You Better Be Dead ... Or Close To It!

This is one serious sign. If you're not bleeding, don't both interrupting. While some people take a "do not disturb" sign lightly, you better heed the warning because whoever is behind that door obviously doesn't want company. Though fake blood could work, to draw them out ... at your own risk!
This Post Belongs To 12 Funniest Do Not Disturb Signs That Will Make You Lol