South Korea's Kim Si-woo suffered every golfer's nightmare when he took an incredible 13 shots on a par 3 at the WGC-FedEx St Jude Invitational in Memphis, Tennessee.
Kim fired five successive balls into the water at the 11th on his final round - his first event since finishing joint 32nd at the Tokyo Olympics.
He had been even par for the day when he stepped up to TPC Southwind's 155-yard 11th hole that features an island green.
The horror hole saw him slip from 5-over par to 15-over and tumble to the back of the field.
Kim finished 30 shots adrift of the trio of Abraham Ancer, Sam Burns and Hideki Matsuyama who finished 16-under par to go to a three-way play-off, won by Ancer.