I'm going to guess this was a bikesdirect bike. I have a Windsor Hour that I got in December and it did the same thing. Only when it happened to me, it completely locked up my rear wheel as the cranks would not turn. I didn't have the tools to fix it and was only 3 blocks (carrying my bike) walking distance to my LBS when it happened, I took it there and my friend helped me out. Ended up with a new BB.

Bikesdirect wasn't joking about tightening EVERYTHING before riding, they obviously just hand tighten everything on their bikes.