Most of the foundational fighting strikes and theory if Jeet Kune Do or Way of the Intercepting Fist. The whole extended arm this is something I added on the spur of the moment. Its not really JKD to extend the front hand like that. You also have to worry about it getting punched and broken hand bones or kicked and grabbed. It can be used in sparring and against untrained or very low level fighters. Just be aware of the pros and cons and experiment.