Simone Bilas on the beam during the women's team final. Photo: Reuters
There were a few wobbles here and there, even for Biles, but those imperfections did not stop them winning the title by a massive 8.209 points over second placed Russia. China were third.
Since the open-ended scoring system was introduced to the sport in 2006, it was the biggest winning margin of any global championships.
They put in such a commanding performance that Biles needed to overhaul a target of just 7.591 with her final floor performance to secure her first Olympic medal.
A score of 15.800 left her and her team mates, Gabby Douglas, Aly Raisman, Laurie Hernandez and Madison Kocian, whooping with joy. It was a second successive team title for the US.