It’s no exaggeration to say that this is one of the cleverest gimmicks of all time.
The illusion that it delivers for the audience is quite beyond expectation.
Magician displays both sides of the stand to show that there is nothing suspicious about it.
Then as he lightly swings it, a silk appears in the stand.
He takes the silk out and once again displays both sides.
When he swings the stand again, another silk appears.
He does this once more and another silk appears, for a total of three.