The video, released by UHP officials Monday, serves as a serious reminder to all drivers not to get distracted by anything behind the wheel.
In mid-December, Trooper Nolan Kerr was approaching an accident on I-15 near the Point of the Mountain and turned on his emergency lights to try and warn other drivers.
That's when he heard a foreboding sound he's become familiar with in his 4 1/2 years patrolling Utah's roadways: the sound of squealing brakes.
"There's not much scarier than the sound of semi brakes," Kerr said.
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