I have the same doubts. For entertainment reasons, I would be interested in the explosions you mentioned, but other than that I would prefer my battery to survive its first recharge, and many more after that.
(Edit: Clarification)
(Edit: Clarification)
Gassing (or smoke, not sure which) starts around 15 sec. Plenty of results for 'LiPo explosion', 'overcharge lipo', etc.
A LiPo fire is a chemical reaction, it cannot be extinguished by traditional fire extinguishers (i.e. smothering does not extinguish, it's creating its own fuel) -- you have to wait for the battery to burn out and then extinguish the remains on fire. Treat your batteries (and electronics with batteries in them) well, folks.
That's the only thing that will save you.