“As a bonding exercise one weekend, Musk, Ambras, a few other employees and friends took off for a bike ride through the Saratoga Gap trail in the Santa Cruz Mountains. Most of the riders had been training and were accustomed to strenuous sessions and the summer’s heat. They set up the mountains at a furious pace. After an hour, Russ Rive, Musk’s cousin, reached the top and proceeded to vomit. Right behind him were the rest of the cyclists. Then, fifteen minutes later, Musk became visible to the group. His face had turned purple, and sweat poured out of him, and he made it to the top. “I always think back to that ride. He wasn’t close to being in the condition needed for it,” Ambras said. “Anyone else would have quit or walked up their bike. As I watched him climb that final hundred feet with suffering all over his face, I thought, That’s Elon. Do or die but don’t give up.”
―
Ashlee Vance,
Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future