Jordan
TS Contributor
Watching POV videos on YouTube, there is no way the train was only 20mph at the point of impact with a full load.
One potential scenario is that the E-stop was pressed after the car left Lift 1. In this case, the trim brakes would have fired to slow the train down before it entered the knot - which might corroborate suggestions that the car "stopped" (or went slowly) through the last inversion before the crash.