If the truck was already on the tracks and a warning was issued (via helicopter/drone), then the train slowed down. This means there were many less injuries and fatalities than might have otherwise been the case. A FF gone bad?
the FF part re train is hard to read - I first thought lucky, too - could (should) have been much worse. I don’t find FF consistent with the other line of some kind of intended act, one person speculates they could have been recruited via Antifa and not told what the true intent was ala ‘you guys block the train, they know, it will stop’. If there was a drone and as there are survivor(s) then stuff is trackable. And it could be they knew ahead and let it play out ... TBD ;)