I remember an old leading hand (RN) regaling me with a dit when he got charged with assault. He had spotted a WREN marshalling a Gannet onto a spot at Prestwick. To him, she seemed mesmerised by the prop/props and she was way too close for the pilot to see her, frozen in front of the A/C. Instinctively, he reached for wooden chock and chucked it at her, dropping her to the ground just before she was blended. May have saved her life but up before the C/O on defaulters!