[SuziQ]

We watched that program. When Hindenburg was coming in, the Captain jinked the ship hard, just prior to landing. A worker inside heard what he thought was a wire snapping, and it might have punctured one of the bags of hydrogen. When the hydrogen leaked, it mixed with oxygen in one of the interior spaces, and went up and out a ventilation port just forward of the tail.

A father and son standing up on a hill above the site saw St. Elmo's Fire at the back of the ship, then a spark must have hit the hydrogen/oxygen mix coming out of the vent. The spark created a flame that, because the ship was tilted with its nose up, moved forward, along the spine, burning the ship along the way.

[Daffynition]

Universal Newsreel