The Witches (1990 movie)
While staying at a hotel, Luke goes into the hotel ballroom to train his pet mouse. A group of women enter the room and lock the doors but Luke remains hidden. The women then take off their disguises, revealing that they are witches. The Grand High Witch (Anjelica Huston) expresses anger with the other witches because of their failure to get rid of all the children. She then shows them her new potion named "Formula 86", which turns kids into mice. The Grand High Witch demonstrates the potion on a boy named Bruno Jenkins.