[evanm]

I'm........skeptical about all of this. Kid-sized sub built from rocket parts in a matter of hours?

[lifeformed]

It's mostly just an inflated kevlar bag with some valves.

[rich-and-poor]

It's easy to build one of something. Especially when the engineers building on of something usually build several of 1,500,000kg rockets.

[pooya13]

Of course an "emergency cave submarine pod" built to specs would have been ideal but emergency situations require emergency measures.

[trevyn]

Welding. See: Junkyard Wars.