That's odd, Jeffery crossed my mind before I read your post.........
No reports of casualtys, so I guess they all had time to leg it before the big bang. Some good ol' boy knocking his cob pipe out into the wrong drum.
Does look like methanol tank exploding, nice clean flame, burned out quick.
If it was anything to do with Arash, you'd be able to hear him giggling hysterically in the footage........