I stored my car with a friend. Well, he just left the cover off the battery box (to disconnect it when we stored it) in the back and pulled the bottle out of the car so the line was just hanging back there. Well, the ground was still connected and just the hot was unhooked. The line ended up touching the positive terminal of the battery...this grounded out the hot side of the battery through the line. We didn't know it until 6 months later when I came back from my deployment. He said "the battery died but she's still good man!" Well, I pop the trunk, wonder why my carpet is burnt in a few spots and what the HELL all the white blobs stuck to the carpet is...the teflon inside of the line melted out of the braided steel and into my carpet. SOMEHOW the car managed NOT to burn to the ground..