When I was 10 this movie was on HBO every other day. My brother and I would lose our minds watching it. It is just pure fun. Read the above article, then go Kennyandcompany.com and buy it. The only way to get it before this was to shell out $40 for a bootleg on ebay.
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.