Leander Seefeld

“The elevator was of the new sort that ran by gravitic repulsion. Gaal entered and others flowed in behind him. The operator closed a contact. For a moment, Gaal felt suspended in space as gravity switched to zero, and then he had weight again in small measure as the elevator accelerated upward. Deceleration followed and his feet left the floor. He squawked against his will. The operator called out, "Tuck your feet under the railing. Can't you read the sign?”
― Isaac Asimov, The Foundation Trilogy (Foundation