The Jumping Rubber Band

I remember seeing this effect performed years ago by Theo. Bamberg (Okito). In the hands of this master of sleight of hand the illusion was a perfect thing.

This experiment is a good one to use before or after the penetrating ring effect. If you use this trick first, you can explain (?) how you did it with the ring. The audience, of course, is none the wiser after you finish than they were before.

A rubber band is placed over first and second fingers of right hand. Another band is twisted around fingers, one at a time, between first and second joints. The first band seems to be secured on fingers by the second band, but in a moment the first band suddenly jumps down around the third and fourth fingers. Then it jumps back again around first and second fingers.