Jessi Combs, the professional race car driver and Mythbusters star, died Tuesday in Oregon following a jet-car crash. She was 36.

According to several reports, local officials said Combs — who is known as the “fastest woman on four wheels” — was trying to break a land speed record. She was the only casualty in the crash in the Alvord Desert.

Combs hosted and appeared on many reality television series related to science or to the automotive industry, like Mythbusters, Overhaulin’ and All Girls Garage. She also co-hosted the Spike TV series XTreme 4×4 for five years.

Former Mythubsters co-host Adam Savage paid tribute to Combs on Twitter.

“She was a brilliant & too-notch builder, engineer, driver, fabricator, and science communicator, & strove everyday to encourage others by her prodigious example,” wrote Savage.

Combs officially became the fastest female driver on four wheels after setting a record of 398 mph at the 2013 North American Eagle Supersonic Speed Challenger. She broke that speed in October by driving 483.2 mph.

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Valerie Thompson, the first woman to reach over 300 mph on a motorcycle, also paid homage to Combs in a tweet.

“It’s with a heavy heart that I pass along the news that Jessi Combs passed away yesterday while attempting to break a land speed record,” wrote the “fastest woman on two wheels.”

Terry Madden, a member of Combs’ team and the driver’s alleged boyfriend, also shared a lengthy and emotional post on Instagram that included a tribute video.

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So I don’t know how to say any of this but it all needs said. I have never loved or been loved by anyone as much as this amazing woman @thejessicombs she was truly my unicorn and I enjoyed every single minute that I had with her. She was the most amazing spirit that I have ever or will ever know. Unfortunately we lost her yesterday in a horrific accident, I was the first one there and trust me we did everything humanly possible to save her!! I’m not ok, but she is right here keeping my going-I made her a promise that if this didn’t go well that I would make sure and do good with it, please help me with that, you are all going to see things on news please believe non of them.. we the family have drafted a release and it will come out today with more proper info, but I was just woke up by the media tracking me down and I need everyone of her true friends to do what she would want “take a deep breath, relax” and do good things with this. Please donate to nothing, I know there will be people try, we are finishing the documentary as she wished and the world will know the truth and her foundation will use those funds to do amazing things in this world and make her legacy live on properly. n the coming days her family and I will get the proper channels put together that you can then donate to that foundation but until you hear it from me wait please-I don’t want some asshole profiting off this (all ready had one try to sell us a video)… . . Love you all and thank you all for being such amazing friends to her, she dedicated her life to helping support others dreams and I promise I will continue that.

A post shared by Terry L. Madden (@terry_madden) on

“I’m not ok, but she is right here keeping my going — I made her a promise that if this didn’t go well that I would make sure and do good with it, please help me with that, you are all going to see things on news please believe [none] of them… we the family have drafted a release and it will come out today with more proper info, but I was just woke up by the media tracking me down and I need everyone of her true friends to do what she would want, ‘take a deep breath, relax,’ and do good things with this,” Madden wrote.

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