It may turn out that there were more deaths due to the tsunami, than the ground shaking. We expect this with subduction earthquakes. With this fault motion, the main ground pulse (Fist of God) is directed down into the earth, resulting in a low PGV on the surface.
This guy survived because he saw all the water disappear, and knew to run like hell! You can't survive a 30 foot wall of water full of cars.