Topic is the question. Occasionally, usually when very relaxed, I'll see one of the boys have a little jerking motion that involves most of their upper body. There is no noise. It just looks like a little spasm that happens every few seconds and then stops. They don't seem concerned at all and are usually half way asleep or just lounging. It is sometimes accompanied with bruxing, but I don't think that's what's causing it because they do that all the time and they only "jerk" sometimes. It's not eye-boggling either, it's very much how having a "hiccup" would appear in a person. Is that what this is?