Terrence wrote:I'd call it a FFFTHUUMP sound.
That is the best written description of the sound out of everything posted here.
As for the finger popping noise, I think that depends a lot on the mechanics of the individual and may be related to grip. My brother, for example, generates this sound on pretty much all of his drives. For myself it is a rare occurance. It seems to show up more frequently with people who do generate tons of snap, but there are also plenty of people who make a shitload of snap and don't get the finger pop. In summary, I can agree with garbulator that the finger pop is not necessarily indicitave of everything clicking on a throw, but it is probably indicative of strong finger spring.