RE: Lipo Sack... EXPLOSION
Yes, you would have to severely neglect a nimh for it to explode like that. That guy was feeding those batteries about 30 -40 amps if you read the description which is way more than most batteries are designed for, especially Alkalines, but the same concept applies to any metal cell battery. If they get too hot, a lot of pressure will build up inside and they'll explode pretty violently.