Keyword Flossing

A boy is given the ability to become an adult superhero in times of need with a single magic word.

A nonverbal voodooist hunts unmannerly commuters while concocting an ill-fated plan to ease an unscratchable itch. https://www.youtube.com/watch?v=GhqIvQmLSlg

In a haunted house, the invisible spirit of plaque - which evidently has the ability to possess rocking chairs - warns children against the dangers of not brushing and flossing.