Those are the sounds you hear from the inside of a specialized golf cart called the picker.
"Whenever people hit the balls out on the range, we take the picker around and try to pick them up as quickly as possible," Shoal Creek Golf Course employee Jake Proctor said.
Each of the five baskets on the picker scoops up and holds up to 75 golf balls. But not all those balls land nicely on the fairway.
"There are people that target the picker," Proctor said. "The first few times it's kind of scary when you first get hit. After that, sometimes you'll play around with them drive in circles so they can try to hit you."
That explains the golf ball proof glass and caged doors on the picker.
From the picker's perspective, the driving range has basically turned into a firing range. It's a good time for the players, even if it's poor etiquette to take aim at the picker.
"It's just fun to hit the cart guy," Champions Tour golfer Dick Mast said.
But does it make a golfer better?
"It makes you more reactive, like in basketball."
Shoal Creek Golf Course is hosting The Regions Tradition golf tournament this week. The Tradition is one of the five majors on the Champions Tour.
"With all the pros out here, within the first hour I've been hit five or six times," Proctor said.