When Simone Biles strode into Ariake Gymnastics Center for the women’s gymnastics team competition on July 27, the expression on her face said it all. Normally all smiles and easy-going, Biles appeared sternly serious and maybe even troubled.

That expression only deepened after she landed her vault in the first round. Intending to do a two and a half twisting vault, Biles lost her bearings in midair and only managed one and a half twists. The low difficulty and execution scores only sealed the deal. “That score unfortunately would go up like that for the team, and I felt I robbed them of a couple of tenths when they could have been higher in the rankings,” she said. “It was definitely not my best work.”

Biles then talked to the team trainer and …