UPDATE: This picture was featured for about 40 minutes as a Front Page Post on Metafilter (before being deleted by the mods for being political.) Thanks, Hanan, for that effort. Between that and the link you put up on grow-a-brain, well over 400 people dropped by today. I haven't seen that kind of traffic in a long while.
I was just surfing flickr and came across that photo manipulation and thought it was well done enough to share here. Scary, but well done.
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.