Why is pic so dark?

Shouldn't there have been more than enough light from a 580EX II flash? 

T2i w 18-55 EFS, 580EXII set for ETTL, camera set on "P" ISO 400 Shot at a focal length of 18mm, 1/60 @ f4, I can't be more then 8ft away, plenty of available light, it's in a car dealership