[Philip Lelyveld comment: so much for the idea that VR experiences have to be short!]
Had I remained there longer than the 10 minutes it took to complete - and I could happily have stayed inside for hours - I may have started to believe more deeply in my strange new reality.
Entering the Void was a very different experience and felt like I had finally fulfilled my childhood dream of stepping inside the TV.
There are walls to touch and a stone throne that you are invited to sit on. It all takes place in a small room but the space feels much larger, with corridors that lead to jungles and pools full of sea monsters. You have to pick up virtual torches and when walls crumble you believe that the bricks are falling on you.
See the full story here: http://www.bbc.com/news/technology-35583355