'MythBusters' Jessi Combs Helped Boyfriend Terry Madden & Son Reunite Days before Car Crash Death

Two days after Terry Madden shared that "Mythbusters" star, Jessi Combs helped reunite him with his 17-year-old son, Dalton, Jessi died while attempting to break her own land-speed record.

On Sunday, August 25, 2019, Terry Madden shared a selfie with Jessi Combs and Dalton where he expressed his joy at reuniting with his son while he thanked Jessi for making it all happen.

"Can’t express how excited I/we are to have this kid here!!!. Got a phone call two weeks ago - 'Dad I wanna come to California for my senior year.' He loaded his stuff in the pickup at 17 - drove 1000 mile across the country by himself from Kansas to California, spent the last week painting and working on his room, and starts school tomorrow as a Senior at Yucca Valley High School," Terry wrote in the caption.

"Thank You !!! So much Jessi for helping make all this happen! You have no idea what it means to me!!"

The happy picture became the last post that Terry shared with Jessi before her death. In 2013, Jessi became the "fastest woman on four wheels" when she reached 398 miles per hour in a special jet-powered car. She broke her record again in October 2018, when she reached 483 miles per hours.

On Tuesday, August 27, Jessi attempted yet another record-breaking run in Alvord Desert, Oregon when she had a fatal crash. The following day, Terry shared a heartbreaking message about her passing with a slideshow of pictures.

"So I don’t know how to say any of this but it all needs said," Terry wrote. "I have never loved or been loved by anyone as much as this amazing woman [Combs] 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."

After Jessi's accident, Terry arrived on the scene first but despite them doing "everything humanly possible to save her," the 39-year-old star didn't make it. To honor a promise he made Jessi if her attempt didn't go well, Terry asked for help in making good come out of the tragedy.

"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," Terry wrote.

Terry also assured those wishing to donate that along with Jessi's family, he will go through the proper channels to arrange for the money to go directly to her foundation.

"But until you hear it from me wait please-I don’t want some [expletive] profiting off this (already had one try to sell us a video)," Terry warned. "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."

One of Jessi's last social media posts before her unexpected passing has become somewhat of a memorial. Alongside a picture of the jet-powered land-speed car, Jessie wrote, "It may seem a little crazy to walk directly into the line of fire... those who are willing, are those who achieve great things. People say I’m crazy. I say thank you [winky face emoticon]."

While Jessi also became a popular host on auto and science television shows like "Xtreme 4X4," "All Girls Garage," and "Mythbusters" when not trying to break land speed records, Terry, on the other hand, made a name for himself in offroad racing.

Terry raced for one of the most successful racing families in offroad racing, the Campbell Racing team. He also served as a co-driver for Dirt Riot, Levi Shirley, 4 Seasons, Ultra 4, and Ultra 4 Europe.

While Jessi had successfully broken the land speed record twice, it is little known that she almost had a fatal accident 12 years ago.