Ashley Dexter proved 3.9 seconds was more than enough time.
The senior guard, honored before the game on Senior Day, raced the length of the floor in the final 3.9 seconds and scored at the buzzer to force overtime in St. Ambrose's eventual 74-64 win over Ashford.
The late layup capped a frenetic final four minutes of regulation that saw the No. 15 Bees rally from a double-digit deficit and then dominate the extra session. After scoring 43 points over the game's first 36 minutes, St. Ambrose scored 31 points over the final nine minutes, including 16 in overtime, to extend its winning streak to 16 games and improve to 22-5 overall.
Ashford (9-20) opened the second half on a 22-6 run to take a 17-point lead midway through the second half. The Bees still trailed 53-43 with four minutes left. Then came the rally.
After a Sydney Greiner 3-pointer, SAU's next 10 points all came from the line. The last two, from Devan Griffin, pulled the Bees even at 56-56 with 34 seconds to play.
Ashford's Madison Wagner scored to put the Saints back in front 58-56 but left the 3.9 seconds on the clock, giving Dexter just enough time for her game-tying score.
The overtime was almost anti-climatic. After the teams traded baskets, St. Ambrose scored five straight points to take control. The Saints got back to within three points in the final minute, but the Bees scored the final seven points of the game, all from the line, to win by 10.
Katie Jensen led all players with 21 points and added 10 rebounds. Dexter finished with 17 points and hit 11-of-15 from the line. Griffin had a double-double of 12 points and 10 boards while Greiner also reached double figures, scoring 10 points.
SAU shot just 36.4 percent from the floor and was out-rebounded 49-39, but the Bees outscored the Saints 31-7 from the line.
St. Ambrose returns to Midwest Collegiate Conference play Wednesday with a 5:30 p.m. home game against Clarke.
Lauren Cash, Ashley Dexter, Nora Masterson, student assistant Carly Norton and team manager Kim Lally were recognized on Senior Day prior to the game.