You cannot have the keys stay in the spectator's hand the whole time, you have to grab the keys back
before you can reveal the ring on them. The trick cannot be done like the first performance
description on the trailer. Watch the rest and note a later performance includes handling the keys
before the reveal. If it could be done like the first description, it would be an amazing trick! But
it's only fair to know the truth that might be missed because of the misleading trailer.