I love to dance when I'm on ketamine, it's SO much fun! It's very trippy, and I love how my body feels when I move it around. On K, my body is supple and relaxed, and it feels like it has become a puppet that I have to focus on to control efficiently. It could be a burden but I tend to see it as a good thing, cause it makes me aware of the mind-body link, how my muscles move and stretch under my skin, where my gravity center is, etc. Any activity involving slow and graceful movements (dancing, as mentionned above, but also swimming, yoga and tai chi) is one of my favorite things to do on K.
He watched three movies in one night? I've never tried K but on MXE time can start dragging after half of the movie. It can also be really hard to pay attention.
any disney film, dim light and go under a thin blanket (takes you back to making dens as a kid) and k hole to the cosmos also watching space documentaries with music on is cool (bonobo & shpongle are my personal favourites for k)