Static charge causes explosion in box truck - video

1:05 video. Explosion at 0:51. What do we have here? Foam offgassing?

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Previously:

https://www.homemadetools.net/forum/...215#post101010
https://www.homemadetools.net/forum/...6845#post84468
https://www.homemadetools.net/forum/...845#post119330
https://www.homemadetools.net/forum/...3329#post98769
https://www.homemadetools.net/forum/...5851#post82647

You can actually see the spark around 0:48. Those look like rolls of expanded polystyrene/polypropylene foam insulation, and if so, I would bet that this is igniting the off-gassing isobutane/pentane that was used as the blowing agent. They should have let them completely off gas somewhere with proper ventilation, but who has time for that?

I would guess that it was thin synthetic cloth that created the charge and is also highly inflammable

video link is now dead