I read that 45 mph jabber too. Take one look at the remains of that car and tell me with a straight face that that much destruction could occur at 45 mph.
Not even barack obama could pull off a lie that big.
Check out my post 35 above with calibrated crash tests.
Based on this, I think it's possible to see the level of damage in the Walker crash from a focused collision taking the car from 40 mph to zero in a fraction of a second, PLUS car fire.