At his former high school gym, Zion Clark, a 23-year-old motivational speaker, and author sought to break the record for quickest 20-meter “walking on hands.” A disabled American athlete has broken world records by walking the quickest 20 meters using just his hands. By walking 20 meters in 4.78 seconds, Zion Clark, 23, established a new Guinness World Record (GWR).