Simone Biles and 'the twisties': The mysterious and dangerous phenomenon that affects gymnasts

You can learn a lot about a subculture by the slang it develops. Gymnastics has a lot of slang around fear: the twisties, headcasing, mental block, bailing, balking.

source https://www.cnn.com/2021/07/28/us/simone-biles-olympics-gymnastics-physical-mental-health/index.html