http://www.extremethaiboxing.com/bruce-lee-method.html "Like a cobra, your strike should be felt before it is seen" The very definition of a good attack, felt before being seen. Sheer speed is one way to achieve this, "One Train May Hide Another" being another Also, it can look like anything but an attack, that's yet another way, and of course, it can be all those at the same time, as can be seen here https://youtu.be/C-fxIOX-fnI?t=66 Sorry for shit music