Can you do it?

It is called the Finger Wiggle. Apart from letting me know whether you can do it, you have to tell me the name of the film it featured in and who demonstrated it in that film?

There is a reason for asking you this. My uncle was in the film (he didn't wiggle his fingers but he did sing) and I've been wondering how I could blip the fact. Those who know me will say that it was only a matter of time before I capitalised on this celebrity link. So here it is!