Apparently car batteries can explode...as I found out firsthand tonight. I hopped in my car, started it, and there was a "boom"...followed by nasty smoke and a terrible noise. I popped the hood, and there was clearly a portion of the battery popped off, and the smoke was all emanating from it. AAA says it's not uncommon for old batteries to do that. Scared the everloving **** out of me though. Anyone else have this happen? Did your car have any long-term issues from it?