By no means the final word, but virtually all of the falling modules I’ve worked around were professional lumberjacks by trade, so in reality, probably at the Faller 1 level - they fall trees all day, every day, for a living. And that really makes sense, since most engines and crews have at least one qualified sawyer on them who can drop and buck the “normal” trees, the falling modules are often called upon to drop the more complex or hazardous trees, so it only makes sense that they are made up of people for whom that is their daily job, and probably better at it than most of us in the wildland fire world will ever get to be.