Elastic
You’re looking at the contortionist Salm the “elastic wonder of the world” as he sits atop a flower vase. Oh, and this photo is from the early 1900’s.
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In Sync
In 1930, people from a nearby rooftop watched as the family members of the Otaris aerial troupe did their balance upside down on a high-wire in Sarasota, Florida. If you have a fear of heights, this trick definitely isn’t for you!