The Shaolin 42 fake out (Commonly called the Nerve strike attack) is a pressure point tackling move that will paralyze the victim and send them to a 20 year knock-out blocking their chi. Its non lethal however once used on the victim they will permanently be able to wishtand it twice. In addidtion to that defect, the victim's endurance could potentionally become greater or significantly weaker.
The only known documentary of the Shaolin 42 fake-out ever being used was by Master Oogway preventing Tai Lung from getting the dragon scroll. After performing the moves necessary Tai Lung immediately dropped to the ground knocked out cold, seemingly dead. Tai Lung was then sent to Chorh-Gom prison who later learned the move and after escaping the prison used it on the Furious Five.
Disclaimer: Most of this information isn't canon and mostly a joke around my family.
In order to learn the Shaolin 42 fake-out you must become a Shaolin, 45th chamber of the 34d dynasty.