Today, I got pissed and tried to storm out of work, only to get outside and realize I couldn't because I'd let my coworker borrow my car for lunch. FML
Next time just go to the bathroom and punch the wall. It's discreet enough to keep you out of trouble, but you'll still hurt yourself a little. But it'll make you feel damn better.
Hope you're not stop making payments on that car! Or need to buy gas. Or food. Or pay bills. That's assuming you live paycheck-to-paycheck. If they were mistreating you and you can afford it, by all means, walk. Don't expect a good reference for job abandonment though.
Took me a while to figure out that OP was angry and not inebriated; in NZ and the UK to get pissed means to get drunk, whereas to be angry is to be pissed off