For the past few months my friend had secretly been working every night on a VR game about being a bird that holds a baseball bat and has to fly around and hit stuff in midair. He spent all this time researching the physics involved and watching slow motion videos of birds flying so that the arm motions you have to do to fly properly are as anatomically correct as possible (though everything involving the baseball bat is very much not anatomically correct for obvious reasons). I put his VR headset on for that. It was neat! Then after that we loaded up VR chat, and he showed me Mario Hell, which was also neat, albeit in a completely different way.
Anyway, it was quite something, sitting on my friend's bed in his tiny room, watching this very large man with massive goggles on his head flap his arms so gracefully.