Ever had a rock kicked up by a car in front of you impact the windshield of your car? Scares the heck out of you, doesn't it?
Imagine the object impacting your wind screen weighing more than a pound and traveling at, oh, 200 mph or so.
That's what NASCAR drivers face every time out -- an unwelcome passenger could at any moment climb aboard through the windshield, and depending on the angle, could do more than that.
"I grew up racing on dirt," said Tyler Reddick, who drives the No. 19 Ford for Brad Keselowski Racing in the NASCAR Camping World Truck Series. "I'm not even used to having a windshield. On dirt, you see a lot of stuff flying into the car with you, like brake rotors and other parts, and even dirt clods big enough to break your bones."