Yep, I get something similar to this. It happens sometimes when it's late at night and I'm trying to get to sleep, makes you feel like you're the only person in the world (like an alien among humans) and like no one else can connect with you. It also happened about a week ago when I was walking and the smell of woodchips triggered it for some reason and I thought about just walking to a new city and starting a new life.

I would never plan to just abandon my current life, in fact I'm quite happy in it, but it's just a weird feeling like being detached from your own personality and temporarily being able to explore the world from a completely different perspective. The easiest way to explain this to people is just to say "It's probably what someone tripping on drugs would feel like". I've never taken drugs (for whatever reason) but I imagine someone who's "high" would get a similar kind of dissociative experience.