 So how does someone know if they have a disc herniation, a slipped disc? I mean, is it something that, oh, I just did something, or is it a long-term, you know? I mean, we all have backaches every now and again. That's a good question. It's really hard to tell sometimes, okay? And it's rare that it's just a sudden thing, like no prior back issue at all, and then all of a sudden there's a disc herniation.