> or more accurately a big pile of bricks the same size and shape as a car with equivalent mass This is an odd assumption. If someone asked me what kind of wa

> or more accurately a big pile of bricks the same size and shape as a car with equivalent mass This is an odd assumption. If someone asked me what kind of wall cars are most likely to run into at 100 mph, I'd have assumed something like a freeway barrier wall that are fully anchored to the ground or the reinforced concrete walls they use for crash tests - something with a mass substantially greater than a vehicle.