Knock an old lady in the head and walk away

I wrote about common courtesy the other day.
Here is another example. My mom was at a restaurant the other day. She went to use the ladies room. When she had her hand on the rest room door, a large man exited the men's room, slamming the door open so hard it knocked my mom in the back of her head. It hit her so hard that it nearly knocked her out. She stood there holding onto the door knob because she was dizzy. The man just walked on by and half way across the restaurant he yelled over his shoulder, I hope you aren't hurt. He never turned around. Mom stood there for a while until she could walk. She forgot she needed to use the restroom. She became disoriented.
She has since suffered headaches and been to the chiropractor three times so far.
Nice fella.