Along with using maneuvering with the Pekiti-Tirsia Kali side-step and take-off footwork, the combat slap is a great multipurpose tool whether it’s to strike (and intercept) a punch, push, or attempted grab (with proper range and timing). It can be manipulated in such a way that it has varying degrees of force (and length of travel), as a parry or strike or both.
When developed properly, the combat slap also has knockout power when targeting the ear or the bridge of the eyes.
Sometimes obstructions in your environment may not allow you to step or run left (as in this case) or shuffle back. So be able to adapt, learn how to maneuver to create advantage, and be able to work with what you have.
Strike and move. Never stand in place if you can help it. (The inability to maneuver will also dictate tactics and techniques.)
Why intercept the attack? To prevent the assailant from disrupting your balance (and mental processing) with the contact of a push or grab, which could turn very dangerous if a weapon is produced after the push or attachment. Nullify the initial attack by striking it down on a 45° angle to manipulate the assailant’s balance (as best as you can).
Note: A simple parry obviously won’t have enough energy to sufficiently disrupt the punch/push/grab as much as the combat slap/strike, so it’s even more critical to side-step on an acute angle and be prepared to quickly move offline again to the flank with a follow-up strike or range out.
While you strike whatever comes toward you (ie. punch, push, attempted grab), immediately move offline line at the same time, then continue to follow up or range out to increase your reactionary gap. Always consider environment as part of the context and leverage it when possible.
Stay alert and create the best possible advantage for yourself.