What would you do?

[lincpimp]

Lipos swell for 2 reasons, over charging and discharging past their rated limits.

So he either over charged the pack, or shorted it. I doubt the goat can pull enough to over discharge the packs during use.

My guess is that the esc crapped out and took the pack with it, he should have unplugged it quickly and saved the lipo.

Or they charged the pack without a balancer and really overcharged one cell.

Either way it is his fault, I would tell him to read up on lipos before he kills the other one. I have sold alot of lipos, and I figure that people buying them know how to use them. If not then they should not buy it. Kinda like blaming Jack Daniels cause you got drunk... really your own fault.