I once convinced my girlfriend to wear the DK1, in one of the demos that came with it (Tuscan villa), without her moving, just looking around a static location.
In less than 10 seconds she ripped it off in a sick panic, and spent the rest of the afternoon looking green on the couch.
In less than 10 seconds she ripped it off in a sick panic, and spent the rest of the afternoon looking green on the couch.
So yeah. People can get pretty wrecked.