Mark Lye at the moment of weight transfer.

3/30th of a second later he reaches maximum force. At this point, he is generating the force of a man weighing 301 lbs.

This is a picture of Mark's back swing. Notice he is loading his right side (65%).

The weight is in his heel.

This point corresponds with frame 144 in the previous picture. This is the point where he transfers his weight. Notice he has a short bust strong move to his left toe, them back to his left heel.