Great weather and some seriously fast cars at Circuit of the Americas on Saturday leading up to the big Grand Prix on Sunday.
According to COTA, more than 78,000 people showed up to watch qualifying and a couple of smaller events like a Ferrari race.
Just a few years ago, COTA didn't exist...so many spectators are getting to experience F1 for the first time.
"I love it! I love it! All the beautiful women, nice cars, I want to be in one," said race fan Lanny Worley.
Yvonne Rodi and her husband are both aerospace engineers. So this is right up their alley.
"How fast the Formula 1 cars are...I mean I know we watch the races on television but it's unbelievable in person," Rodi said.
There was a UT game happening during F1 "day 2" and there were a lot of burnt-orange-wearing Longhorn fans in the audience wondering what the score was.
"I am missing the big game! I didn't know it was gonna be this big. So we kind of planned this like in advance," said Sean Feng.
Many of the Longhorn fans in attendance had that same problem. They didn't know Saturday's Longhorn game would be such an important one when they decided to go to F1.
"I mean we're Longhorn fans but this only comes once a year," said Zarin Behransha.
Big crowds also turned up downtown for the third day of the F1 "Fan Fest." Price of admission? Free! That way young and old could experience all things F1 without even having to buy race tickets.
Real cars, the occasional appearance by an F1 driver, driving simulations, even a zip line...
Sunday's the big day for F1. The gates at COTA open at 7:30 in the morning.