The videos, produced between 2005 and 2006 by Texas-based guardrail maker Trinity Industries, show cars ramming into what a company executive said was an "experimental" configuration of its ET-Plus guardrail system. In five tests done with small passenger cars, plaintiffs in the case against Trinity say that rather than absorbing the impact as the guardrail is designed to do, the metal structures failed, in two cases causing the car to roll over and in another apparently impaling the vehicle.