Actually the first time I ever used a VR headset it was a program that put you in the dinosaur era. There were some triceratopses and hadrosaurs walking around in front of me, then I heard a branch snap behind me, I turned my head and saw a Tyrannosaurus and it was legit the scariest experience of my life. The graphics weren't even that high quality, but I don't think my flight or fight response takes the time to measure a predator's polygon count.