On reading the excellent comments that Ed Storms posted, I was moved
to write the following. When I saw the photo of what I assume was the
remains of the bottom of the vessel, I though of a detonation
producing a shock wave which was focused on the center of the vessel.
How this happened I haven't got a clue. I've seen the video of Yuri
Brown putting a spark into the gallon milk jug of Brown's gas, the
bottle imploded. IMHO, there is nothing other than a high explosive
that would account for the damage to that vessel, ergo, something
happened that we don't understand.
