This is an interesting deal . . . . Thrust of what?
Here's another thing to knaw on a bit . . . if the hands are also swinging in something considered an arc . . . would they not reach their low point PRIOR to the clubhead reaching it's low point? I have found for me anyway that once I figured out the down and out portion I over did it and actually ended up shifting the plane line out. For me now my hands have to work left for the club to stay on plane and keep going out to get the throw out on plane.
The Thrust (an Acceleration force) May be Muscular (Right Arm) Force and/or Centrifugal Force (Pivot). Thrust is the strong pressure of one part of a structure against another.
Regarding your Hands reaching their Low Point, it depends on if their is movement of the center (Left Shoulder for a Left Arm Stroke) to get to its Impact Fix location.