-Newton’s Third Law of Motion.
“Don’t tell anyone.” Dorothy hissed.
Her voice drifted up the stairwell to where Lillian stood. Lillian paused instinctively, her hands clutching the banister, one foot dangling in midair. Far above her head, a startled pigeon fluttered up and escaped through a broken window. The clatter of wings made Summerson’s reply inaudible.