http://unixeno.i2p/blog/6
No one related to me does this, just me, so I have no idea how I came up with this "method" I have to assume that I must have just taught myself how to snap my fingers, as that seems the only explanation.
I first discovered this when I was watching a youtube video and saw someone snap. The person on the video was from Europe, so I first assumed that the other way must have just been a cultural difference....