Your cat is a very curious and brave feline
No on both counts - maybe (see below). Visually, during the comedown, I get what pretty much everyone else gets I guess (pretty blues/greens/reds/yellows, things breathing.. playing guitar at this stage is epic, the fretboard changing size and all lol. And strumming makes the visual field vibrate.. hard to see which string is which, but somehow it works out).
Audio wise, I tend to lose the ability to precisely pinpoint where sounds are coming from, my perception of sound also tends to "wiggle" (the visual breathing stuff, but manifested aurally, I guess. It feels like the same thing, but on a different sense).
Paradoxically, I can hear much better (altough I can't pinpoint WHERE the input is coming from.. example, lying on the beach on the come down, and being able to make out conversations from people walking on the .. uhm, catwalk may not be the best word (english is not my primary language), but you know, these wooden paths that sometimes are adjacent to beaches).
The above is the sole reason I avoid riding my bike on the comedown. I did it once and quite enjoyed it, but not being able to pinpoint where sounds are coming from is a serious handicap. Coupled with looking at the sea (the colors man.. the colors) instead of looking ahead, it's a recipe for disaster
Aurally, I also get lots of echos.. listening to the sound of the sea is particularly interesting for me.
I guess audio wise, m.. err my dog and your cat may be experiencing something similar, just expressed in different words?
This is the time to really find out who you are and enjoy every moment you have. Take advantage of it.