This is another article that will draw yawns from those already familiar with carrying locking folding knives, but it dovetails nicely with the article I posted previously on the wrist snap (http://www.philelmore.com/martial/wristsnap.htm):

The New York Drop Opening (http://www.philelmore.com/martial/nydrop.htm)

Mr. Hartman can do this well. I must say, I don't like it--but any time one "snaps" the balde there is a psychological advantage gained! It's a scary sound.

An other problem with this opening is that a knife with a heavy handle can pull the blade out from between the thumb and forefinger and you'll drop it on the floor.