It is very vague what you ask.
Low energy implies a low kinetic energy involved, (drunk dude about 6 feet off the ground will only have 6/2 feet *m*g potential energy that may be converted into kinetic which eventually gets absorbed by the sidewalk (and his face)
Hard lateral may imply a direct perpendicular hit with high energy. Possibly a quad carrying a huge rock drops the rock right on the sidewalk.
hmm.... i think I should have gone with the pecker + analogy