I mean you can really see it when you don't knock on a door. For example, when you knock on your table you just tap it with your fist and there you go. Depends on how you knock though XD.
I mean you can really see it when you don't knock on a door. For example, when you knock on your table you just tap it with your fist and there you go. Depends on how you knock though XD.
Haha yeah, you can just knock on the door leveled on your hand if you want to.
well that is kind mind blowing