@KoiwiGal - People will do strange things when they have back pain. I don't blame them, I know it is the most annoying place to be sore. And a herniated disc can be excruciating. Plus having to rest the area is very frustrating as well.
But, I remember my dad used to get us to walk on his back when we were little, as a way to give him pain relief. My dad had injured his back playing basketball. I don't know if it was a herniated disc or not. Probably not, although he did that once or twice.
But he got my mother and us to take turns stepping on his back while he was lying down. I'm not sure what it did, but he said it made him feel better.
I'm glad I don't have back pain at the moment, so I don't have to find out for myself!