You know the effect??Magician pours salt into his empty hand and then throws the salt up into the air and it has vanished! Viola! He supposedly catches the vanished salt in his other hand, closes the hand and begins to pour and pour and pour and pour until the hand is now empty and the magician is clean. Where did the salt go? How did he catch it again?  This is a pour that is long enough, but not boring and gives the performer the opportunity to use theatrics during the effect.