I forgot to disconnect the battery when adjusting the tension of each belt, and while tightening the alternator belt there was kind of a loud snap sound and kind of a small yellow flash (it's difficult to describe). So before continuing I disconnected the battery, but when I was done and went to start the car, there was no response. No headlights, no window operation, no dash lights, nothing. How much damage do you think I caused, and what's the order in which I should check things? Could it just be fuses? Please help!

 

Nevermind, it was just a battery fuse. It's all good, now.