Reverse Swing

Reverse swing differs to conventional swing as it moves in the opposite direction. Conventional swing uses the smooth side of the ball to cause swing. The ball moves from one side to the other due to having less air resistance. However, reverse swing occurs when a ball is travelling incredibly fast (+85 mph.) The laminar boundary layer transitions into a turbulent state before reaching the seam location.
The seam makes the boundary thicker and weaker and it therefore separates earlier than the side on the bottom as seen in figure 1 (right). The side force has switched and therefore causes the ball to move the other way, the opposite to the "norm."

A Deterministic Model for 100m sprint.