Seeing a "Wacky Waving Inflatable Arm Tube Man" makes 11-year-old Ayden Keating happy. Really, really happy. Ayden, who has Down syndrome, noticed one a few weeks ago in Nixa and has been obsessed ...

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The wacky, waving inflatable arm man is the universal symbol for car lots and sidewalk sales of all sorts, and he has an origin of which you’re probably not aware ...

(via Steve Mould) Hose instability describes the dangerous phenomenon of nozzle whip the fire fighters experience but also sky dancers (Wacky Waving Inflatable Arm Flailing Tube Men).