For those who don't know In June 2024, Los Angeles-based YouTuber Jake Laser (JLaservideo) built a custom four-legged robotic wheelchair for his father, Mark, who lost his mobility 20 years ago due to multiple sclerosis. By mounting a racing seat onto a heavy-duty Unitree quadruped robot and reprogramming its balance system, Jake enabled his dad to navigate rocky mountain trails, climb stairs, and go hiking again for the first time in two decades.