We spend two and a half days building up to the climax of the Relays, and then it's all over 40 seconds.
It's time for one of the true marquee Saturday events, the USA vs. the World women's 4x100-meter relay. ESPN2's telecast has just hit the air, and figure that this will be the first race of the show.
But of course, we'll start when ESPN2 tells us to, so there are still a few minutes left before the gun.
Be ready for some serious speed: Lauryn Williams starts off for USA Red, and Allyson Felix anchors.
And it's a USA sweep: Red first in 42.57, Blue second in 42.64. Jamaica had the lead for a little while, but Felix showed her stuff in the anchor leg and there wasn't much doubt as she came down the home stretch.
Credit to the fans, too: the ensuing "U-S-A!" chant was perhaps the loudest I've ever heard here.
The full result:
1. USA Red, 42.57 (Lauryn WIlliams, Miki Barber, Lisa Barber and Allyson Felix)
2. USA Blue, 42.64 (Muna Lee, Torri Edwards, Carmelita Jeter and Sanya Richards)
3. Jamaica, 43.31 (Kerron Stewart, Nadine Palmer, Aleen Bailey and Peta Gaye-Dondie)
4. World All Stars, 43.90 (Lavern Jones, Jovanne Jarrett, Sherry Fletcher and Oludamola Osayom)
5. Bahamas, 44.52 (Timicka Clarke, Debbie Ferguson, Jackie Edwards and Chandra Sturrup)
6. Trinidad & Tobago, 44.72 (Semoy Hackett, Sasha Springer, Reyare Thomas and Ayanna Hutchinson)