Semi Truck Teeters on Cliff Edge Before Tipping and Rolling Down Steep Hillside Southern California — A tense roadside scene turned catastrophic when a semi truck became stuck on the edge of a steep mountain slope, slowly losing balance before tipping over and rolling down the hillside below. Video from the scene shows the white tractor angled sharply toward the drop-off, its front wheels hanging dangerously close to open air while loose gravel slides out from beneath the tires. For several mome