What Do You Do When You Have Chim
You go to Disney World!
Or more specifically, you
walk to Disney World until it walks to you.
But, seriously, I like to think that CHIM's kind of like realizing you are part of the dream of a massive conciousness and instead of vanishing into nothingness at that fundamental realization (Since you do not "really" exist), come to the understanding that the entire universe, including yourself, is a mutable thing beyond the bounds of whatever it is to be "real", and thus gain the ability to alter it to your liking. I guess this is limited by the fact that there are a number of others (Daedra, Aedra, etc) that have a very similar perception of matters.
Essentially, a mortal's concept of their "reality" is only as "solid" as that mortal's senses and their beliefs make it to be.
I think whoever comes to that kind of realization has bigger fish to fry than any kind of concerns that we could understand, much less even comprehend, and that's why I can sort of understand why people find the whole Talos CHIM thing to be a bit silly.