If it’s just a half hour and my boss is here I just stick my head in her office and tell her that “I’m toast” or “Stick a fork in me.” If my boss isn’t here, then I’m the boss so I just leave. If it’s more than a half hour, I’ll actually ask (rather than just informing her) and explain why. If she’s not here, I’ll send her an email (she’s a crackberry addict) and take off.
I smuggle my stuff (coat, handbag, etc) to my car at lunchtime. Then 5 minutes before I need to leave I stand up and start slowly backing out of the office. Each time anyone looks in my direction it appears that I am walking into the room. I keep this up until I back myself completely out the door.
Then I run like hell.
nah seriously I am the boss and can leave whenever I like
I get up and leave.