Boo the cat isn't a big fan of being left to sleep outside his master's quarters. Luckily for him — less so for his owner — the bedroom door comes equipped with a very noisy doorstop (read: kitty-powered alarm clock).
Boo's human explains:
My cat Boo has the terrible habit of messing with the door stop to wake us up early in the morning. He doesn't do it because he's hungry, he does it because he feels lonely. When he flicks the door stop it scares the crap out of us and we wake up right away.