This is Kainoa Harbottle's Penguin Live lecture but you get a free tutorial of the fingertip muscle pass both as a separate download and he goes over it a bit in the lecture.
(note: some things said in the lecture are unnecessary and bad).
The lecture as a whole is also pretty good as well.
Also you can see Ponta the Smith using it in some of his tricks/routines in his DVD "Sick". (He uses a fingertip muscle pass in his 3 fly routine by the way.)
Also you can see Ponta the Smith using it in some of his tricks/routines in his DVD "Sick". (He uses a fingertip muscle pass in his 3 fly routine by the way.)