With a breathtaking time of 4 minutes 0.99 seconds, 41-year-old American David Rush has won the title of longest duration balancing a running chainsaw on the chin.David has broken several records over the years and presently holds over 200.David prepared by working out to increase his strength and endurance. To become used to holding so much weight, he balances a barbell with 30 or 40-pound weights on one end on his chin.Wearing a helmet, gloves, goggles, neck protection, and, of course, having someone ready to pull the plug if needed, he also took many safety precautions.
