1) Feld was not the promoter of the event in Wisconsin where this most recent fatal accident occured.
2) The truck in question was not "out of control", in fact it was making its way back to the parking area after making a run.
3) If you watch the long form version of the video, it looks like Sampson's driver expected the other machine to cross the arena (criss-cross, like the old TF days with push starts) to return to the parking area. He actually stops, but the other machine makes a U-turn to return down the same side of the arena as he just ran. IMHO, Eisenhart expected one truck to return down each side of the arena floor and never expected Sampson to be following the other truck. We will never know, but it is my belief that if the first truck had returned down the other side of the arena, Eisenhart would not have walked out until Sampson drove by.