WHAT DOES SELF DEFENSE AND POKER HAVE IN COMMON?

It's called the poker face and you need to have it when in a threatening situation. The reason why. So you dont telegraph your intent to attack. Every time someone is going to attack they telegraph there intent some how with their facial expressions. Sometimes it's tightening their jaw or making some type of facial expression. This in turn gives your opponent a heads up on what you are thinking of doing and he is able to prepare himself for battle. So how do you go about having a poker face in a self defense situation? By pressing your tongue to the roof of your mouth this will help restrict the facial expressions you make while executing your attack putting the element of surprise behind you. Also by pressing your tongue on the roof of your mouth this will help prevent you from biting your tongue if your are hit in the jaw.