Still, Caitlyn Jenner is the ultimate adrenaline junkie and when she and Kylie went for a spin around the track in Kylie's new Ferrari 458 convertible, the adventure was almost too much for the 18-year-old.
Kylie Snapchatted some videos of herself and Cait cruising around the track, joking in one of the video captions "Don't get in the car w/an ex race car driver," referencing Cait's racing days back in the '80s. Cait is such a bada**! She literally shows NO fear as she's flying around those turns in the Ferrari.
It looks like they ended up having a really good time, though, and it's fun to see them doing cool stuff like this together - even if we are totally jelly!
Kylie brought along two of her friends, Jordyn and Stas, who got to drive a Bentley for the day and Cait brought along her close friend Candis Cayne, who we didn't see doing any racing, but was probably cheering them on from the sidelines!
Kylie was invited to go to the iHeartRadio Music Festival over the weekend, but she tweeted that she promised Cait she would spend some time with her - and we don't blame her for not wanting to miss this epic girls' trip!
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Gallery | Caitlyn Jenner's Fab New Life