An unknown driver manning an older-model Ford Mustang led state troopers on a chase last week on Interstate 70, outside of Glenwood Springs, Colorado.

Unfortunately, authorities were forced to give up once the Mustang, first clocked at 140 mph (225 km/h), sped up to 150 mph (241 km/h) – despite the troopers turning on their sirens and lights and beginning pursuit. Apparently, the chase took place on a stretch of road with hazardous curves, where Interstate 70 follows the contours of the Colorado River.

“They tried to catch up. They weren’t doing it. They couldn’t get close enough” stated Colorado State Patrol spokesman, Trooper Gary Cooper.

In the end, the officers decided against risking their own lives and pursuing a car going that fast, as reported by the Denver Post.

“It’s extremely reckless, especially with people who haven’t been trained to drive at those speeds. I’ve seen a deer total a car before.”

Cooper than added that brakes tend to get hot and tires can suddenly blow out at such high speeds, so calling off the chase may have actually saved the life of the driver.

As for the older-model Mustang, we have no idea which generation it was – though it would have to be one mechanically capable of climbing to those speeds.