Of course, participants must also absolve the organisers of any liability over twisted ankles or other injuries.

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With nothing to keep a wearer's foot in place, flip-flops can also lead to tumbles, twisted ankles and even broken bones.

CNN: Flip-flops present feet with a painful problem

On other plays, he had his ankles twisted and his body contorted in ways that made him look like a Cirque du Soleil performer.

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