I must admit, I wasn’t taking a shower when I had that thought.
In 2018 a tv commercial premiered this projector mapping tech during a Superbowl commercial for Ponds cold cream…
https://www.youtube.com/watch?v=XvDtMeKgcioThe behind the scenes video…
https://www.youtube.com/watch?v=dCQGarGxRXMI do feel like this would be very difficult with the inconsistencies of human movement. Would be difficult to get the projections to line up. That said, people have done similar stuff, mostly early Pomplamoose music videos
https://youtu.be/i7X8ZnmLfM0, https://youtu.be/dm3ZEMQf98k, https://youtu.be/tk4_SMI0jVc
I would also consider Ok Go’s “I’m Not Through” commercial to be similar in concept.
Projection mapping software generally assumes the surface(s) you are projecting onto is stationary. You might need special software to target a moving object
Were you dancing at the time?
I imagine it’s not as easy in terms of producing the template video to match your body type (and maybe agility) and then to set up the projection just at the right distance. Conventional wisdom might also say that you learn dance moves better by copying others and that’s why you get floor to ceiling mirrors in dance studios.