I've been in one of these before briefly, and I'll agree it immediately affects your balance - in a way that wearing headphones doesn't. Not sure why, perhaps t

I've been in one of these before briefly, and I'll agree it immediately affects your balance - in a way that wearing headphones doesn't. Not sure why, perhaps the brain only uses these cues below a certain threshold of sound. That was in a chamber with the lights on, and only for a few minutes. I won't discount the possibility that after a half hour it could be very difficult to maintain balance.