May 29 (UPI) -- An Idaho man broke a potentially deadly Guinness World Record he has pledged to never attempt again: the longest duration balancing a running chainsaw on the chin. David Rush , who holds the most concurrent Guinness World Records titles, attempted the record at his oldest son's last soccer practice of the season in May 2025, and the record-keeping organization has now confirmed he officially holds the title. "Some records are simple. Some are hard. Some are flat-out terrifying.