You don’t have to look far to find reports of people who have used VR headsets and then felt ‘off’ after removing them. While motion sickness is surely the most well-known post-VR symptom, a subset of people say they have experienced feelings of being ‘stuck in VR’ after taking off their headsets. It’s tempting to brush off such reports as someone having seen The Matrix (1999) one too many times, but it turns out there is a clear scientific basis for the sensation.