Hart was driving a souped-up version of a 1970 Plymouth Barracuda, a classic two-door muscle car, when the car crashed through a fence on Malibu Hills' Mulholland Highway, Hart was reportedly trapped under the crushed roof of the vehicle, according to TMZ. If the vehicle was equipped with a roll cage, the roof likely wouldn't have been crushed in such a manner, and Hart would've been better held in place by a five-point harness. TMZ reached out to Speedkore, but the company had no comment.