Agree with this. Another factor is that even if you don't go under, the grill is higher up. If the impact is centered on the legs or pelvis you might have serio

Agree with this. Another factor is that even if you don't go under, the grill is higher up. If the impact is centered on the legs or pelvis you might have serious damage, but will most likely live. If the impact's near the chest or head, there's a lot of delicate vital organs. The increase in trucks and SUVs is a major reason why pedestrian fatalities has increased so much over the past decade. (Though the auto industry has tried to shift the blame to cell phones.)