Purpose: To prevent runners from taking advantage of the current blocking rule when they are clearly not going to be safe at the plate.
If a throw from a fielder is caught by the catcher before the runner is within1 stride of the catcher, the runner is automatically called out (like the infield fly rule.) The runner (if he continues) is obligated NOT to collide with the catcher even if the catcher is blocking the pathway by taking the throw.
If the runner reverses and tries to reach 3rd base, normal rundown rules will apply.
What do you think ?