So here is the scenario: Map: Gridmap Car: Grand Marshall Config: Police Package, no modifications Speed of Impact: 100 MPH (exactly) Surface: Flat wall perpendicular to vehicle So upon impact the car crumpled as normal: and I should note that I was in 100 times slow-motion just before and during impact. The car flipped over, and began to skip around on the ground as if two or more parts were trying to occupy the same amount of space. A possible culprit could be the light-bar, but that could be a long-shot. EDIT: This only happens when the vehicle is upside-down. GIF of what's happening Multiple shots of many angles including a close-up of the light-bar with nodes on.