Nadia Comaneci Olympics July 19, 1976 Note: Must be a gymnast thing with the nail biting type of thing. Anticipation? Nerves? I used to do this all the time before doing a routine whether in practice or in competition except I used all 4 fingers ( I omitted the thumb.) Just find this interesting.
TOPSHOT - Brazil's Flavia Saraiva competes in the women's balance beam event final of the Artistic Gymnastics at the Olympic Arena during the Rio 2016 Olympic Games in Rio de Janeiro on August 15, 2016. / AFP / Ben STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)