In magic, a chain and a ring, put the ring on the chain, how can the ring be put on the chain as soon as it is released?

The magic steps are revealed as follows:

1. Prepare an iron chain and a hoop for the audience to see.

2. Hold the iron ring by hand and put it on the chain.

As soon as you let go, the chain will fall by itself.

4. Put the iron ring on your face again. Note that at this time, the edge of the iron ring stops on the middle finger of the left hand, and the index finger of the left hand quickly touches the chain.

Then, as soon as you let go of the iron ring, it will naturally be put on the chain.