Flappy 1

I tried using the 'flappy' hand away from the strings and then bring that motion to the strings. I understand, (from your descriptions) 'what' I'm doing. I just can't seem to 'correct' it?... I default to "what is comfortable" I'm guessing? Watching my hand in slow motion is like a train wreck. I 'see' the up/down 'door knocking' action of my hand in this one.