“The only memories I really have are mainly at night. You could hear the swooshing of all the iron lungs.”

Mr Gilliver moves towards the camera, swooshing his light sabre before disappearing down the trap door.

A key part of their explanation comes from the “swoosh” graph below, which Smith and de Mesquita present in the 2022 edition of "The Dictator’s Handbook."

Ted Walsh, former assistant equipment manager for the San Francisco 49ers, got so good at inking the Nike swoosh that he could draw it in the dark.

The air, bathed yellow by safe lights, smells of photographic chemicals and is filled with a rhythmic clicking and a shuttling swoosh.