From a hilarious memo attributed to Wal-Mart management:
In recent weeks we have had associates clog the toilet bowls with nearly a whole roll of toilet tissue, urinate on the floor and walls, smear human waste on the walls and leave human waste on the floor or in receptacles not meant for waste. One day an associate left a nose taped to the stall that read "A nice cake is waiting for you." Inside the stall was a mound of waste left on top of the toilet. For a few days we tried to leave the restrooms open whlle the custodial associates were cleaning. We had several incidents where the custodial associates were shown disrespect. One associate used the urinal right next to where the custodian was cleaning and sprayed urine on the custodial associate�s arm.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.