Watch this WWII commando veteran explain how to spot a sniper

“You always get enemy snipers,” says Roy Cadman, a WWII veteran of Britain’s No. 3 Commando, talking about fighting the Nazis in Europe. “… And they’re a bloody nuisance.”

Cadman is a 93-year-old Chelsea pensioner, a resident at the Royal Hospital Chelsea, which is a nursing care facility for veterans of the British Army of an advanced age.

In the video below, he explains that you hear the crack of the bullets before the discharge of the sniper’s rifle in the distance. The distance between the two sounds helps determine how far you are from the sniper shooting at you.

“You can work out the distance,” Cadman continues, “but you can’t work out the angle of where he is. You have to look out at that distance from your right. If you were him, where would you go?”

The idea is to find a place where a sniper would hide himself in a European battle, things like bushes, houses or roofs. Cadman explains that it’s a skill the Tommies learned and honed over time, learning exactly where to look.

In other interviews, the old, bold commando also told the Army Museum about his landing at Sword Beach on D-Day, how he joined the British Army at age 17, and how to scale cliffs, build bridges, and span rivers with a simple length of rope.

He notably returned to Normandy in June 2016 to spread the ashes of his departed No. 3 Commando comrade Fred Walker.

The video is one of many from the U.K. National Army Museum’s “The Old and the Bold” series, where veterans of World War II and the Korean War share their stories and experiences from the battlefield.