A motorist on a frozen stretch of highway in Montana captured a terrifying moment on their dashcam when a semi-truck lost control, jackknifed, and flipped in a chaotic cloud of snow. The video starts with cautious winter driving before the semi ahead suddenly starts to slide, its trailer swinging uncontrollably. In an instant, the trailer swings across the highway, and the cab is pulled with it, overturning violently onto its side. “It happened so fast you barely process it,” said the driver who