You did better than I could with the text but the video does show an explosion ahead of the truck which then passes through the flames. Very brief.
https://www.youtube.com/watch?v=xpR1JINiAT4
You bet, it appears to be an explosion way in front of the truck..Might have been something ejected forward off the truck but it didn’t look like it.
It look like an aircraft crashed right in front of the truck...
In fact, it’s possible the jet engine broke free, and launched right through the truck cab and exploded.
The explosion off the runway looked to be before the truck got there and was typical airshow pyrotechnics. The truck was spewing a lot of flames as it decelerated but I don’t know if that’s normal for those things or not. Then it ran off the pavement and flipped, judging from the dust cloud.
}:-)4