Olympic and world champion gymnast Simone Biles has pulled out of the Olympic gymnastics team and all-around finals after a dramatic performance on the vault. The athlete, who has often been called the G.O.A.T, was seen walking off the arena floor, and later telling her trainer: "I don’t want to do it. I am done." Biles addressed the decision later in a press conference, where she said she took a step back to focus on her mental health. Chief psychiatrist at Columbia University Medical Center Dr. Jeffrey Lieberman joined Cheddar News to discuss.