Simone Biles faltered in her first competition in Tokyo, finishing second in one of her most dominant events

• Simone Biles faltered during her floor routine at Tokyo Olympics gymnastics qualification.
• The American superstar flew out of bounds during her tumbling pass for a massive deduction.
• Biles still made the finals for the event, but she found herself in a rare position: second place.

Simone Biles suffered a rare - and massive - error during her first competition at the Tokyo Olympics.

During the floor exercise at the women's gymnastics qualification event, the American superstar stepped out of bounds for a major deduction.

And while Biles has been known to teeter out of bounds from time to time due to the immense power on some of her passes, Sunday's error was more jarring than usual; Biles flew clean off the mat during the second-to-last pass of her other-worldly routine.

Biles' showing on Sunday was a far cry from what her floor routine looks like at its best - and from what it looked like during podium training just two days before the qualifying competition. Even so, the 24-year-old finished with a 14.133 score, leaning heavily on her high difficulty value to get herself into the final.

Still, the greatest of all time in her sport found herself in a rare and unfamiliar position for the floor exercise: second place.

Biles will have some time to right the ship ahead of the floor final, which is set to begin a 4:45 a.m. ET on Monday, August 2. Fans can tune in then to watch live via NBC.

Check out the video of Biles' whole floor routine from qualifying below: