Ohhh.....this is embarrassing. So I get home, and I'm getting ready to pull the alternator off and grind the bracket down. Then I figure, no, screw this, I took this car into the shop for work, and now it doesn't run. This is their problem. Plus they offered to take a look free of charge since they felt somewhat responsible.
So AAA tows the thing in for me (no charge). I call the shop later and say...is it running? Yeah, it's running, come over and pick it up when you're ready.
So I get there and say..so what was the problem?
Oh. Man. I'm really very sorry. When we put those pulleys on for you, we didn't switch the belt for a smaller one.
They charged me next to nothing for a new belt. No charge for the installation. They apologized. No damage done to the car, and I only lost a few hours of my time with the tows (I get hours of my time wasted by other people all day...so how could I be super pissed at these guys when they admitted and apologized for something that was their fault).
No harm done. Today is another day.