That is very bad I stabbed one to see if i could relive pressure stupid Idea on my part.It blew up I didn't know about that untill it happened I would just buy a new pack If it went threw all of them. or if you think it did do what whackinski said. I do sell 6 cell lipos 3s2p and for a test to be sure of safety we tried to blow them up so my coustemers would be safe with them and it will not catch on fire if you short them it will just shock the piss out of you and your cells will be no good. We found the only way to make them catch fire is to discharge them at a very high rate or charge them at a high rate.