It is not an exaggeration to call it one of the biggest college basketball upsets in decades. Stephen F. Austin beat Duke on Tuesday night, 85-83, in overtime. At Duke. And it ended on a coast-to-coast buzzer beater sure to be replayed for years to come.

Here are 10 things about a game that made fans everywhere do a double take.

1. The Blue Devils had not lost at home to a nonconference opponent in 150 games. In 2000, St. John’s beat them, 83-82. The winning basket that night was made by Bootsy Thornton, who is now 42 years old. “The Duke lineage, we haven’t lost a nonconference game here in 19 years, so for us to be that team kind of sucks,” said Cassius Stanley of Duke. “Actually, it sucks a lot. So I mean, that stinks, for sure.”

2. Going into the game, Duke was the No. 1 team in the country at 6-0, with wins over No. 3 Kansas, California (by 35) and Central Arkansas (by 51).

3. Duke was a 27.5-point favorite over Stephen F. Austin. It was the biggest upset in the N.C.A.A. in 15 seasons, ESPN reported.