I'm defending a few personal injury cases for the city, and as a result, I've learned a little something about pain. Here's a short list of things that can cause back pain.
Being in a car accident.
Swinging a golf club or a baseball bat.
Going to a clumsy chiropractor who gives you a push and knocks a disc out of place.
Sleeping on an old mattress.
Mellow-thighed chicks putting your spine out of place.
Reading about back pain.