Been there, done something close to that as a driver, too... Almost got canned when I got back from that run - 'Til the boss heard my end of what happened and saw the rips in my jeans and the teeth marks in the upper of my boot. The customer had called to bitch about how horribly rude I'd been, and why didn't that cocksucker of a delivery guy give 'em their pizza, and by god I'm gonna sue the shit out of you assholes 'cause that bastard maced my dog then kicked the shit out of him - but didn't bother to mention the fact that the dog only missed taking a chunk out of my leg because I was wearing my barn boots instead of the regulation sneakers that night, and he (or whatever it was) couldn't get through the leg of my jeans and the boot leather to reach meat before I started beating it as best I could with the pizza box, hauled out my can of mace and doused the beast, then put the boots to it until it got the idea that coming at me the way it had was a really bad idea, and decided it had someplace else it needed to be, yesterday if not sooner. Meanwhile, the owner (presumably) stood there alternating between looking at me like I'd grown three extra heads and gawping at the spectacle. We stood there looking at each other for a moment as the overspray from the mace started making both of us start coughing. I choked out something along the lines of "Next time you feel like a pizza, lock that fucking brainless mutt in a bedroom or something" as I walked away with the (thoroughly mangled) pizza in hand.