Simon Biles, the star athlete of the Tokyo Olympics, said “twisties” threw her off in the all-around finals and forced a realisation that she needed to withdraw from the event. But what are the twisties that have everyone in a twist? On Tuesday, Biles said her teammates witnessed her twisties during practice. Her struggle was confirmed during the medal round where instead of the planned two and a half twists, she only did one and a half.