Secret:
You switch one part of your thumb with the thumb from the opposite hand. The picture shows the final positions of the thumbs on each hand. You have to practice placing your thumbs into this position. Also note the position of the first finger on the right hand. When you’re ready to perform the trick, you should be able to quickly position your hands in this manner.
Note that these hand positions are used when you want to “separate” your left thumb. If you want to separate your right thumb, you must reverse the positions.
