For me, I personally feel enclosed and slightly seasick. I don't think it's a weight issue, but something to do with the inherencies of the system. I can stand a hololens longer than a Vive, for instance.
Interesting - are you prone to claustrophobia? It sounds like what you experienced is similar to that, from what little I know about the condition.
Do you have the same response when wearing other kinds of goggles or face shield (say something like welder's goggles, or lab goggles, or a scuba mask, or a welder's hood - things like that)?
I don't think I've ever heard of this being reported, but it doesn't surprise me as a possibility, either. It may even be mentioned in the literature out there (while I have an extensive collection of literature and research papers on VR, I'm certain I don't have anywhere near all of it).
