I get this with my non-TG-related dysphoria (that is, I feel like my body is much too big and the "right" size would be something quite medically impossible).
When I've had a few drinks, or sometimes if I zone out, I'll get the distinct feeling that I'm suddenly a very tiny person floating around in a normal-sized body that is a superficial extension of my physical self. Like, I will literally feel as though I have tunnel vision from looking "out" through my eyes because the "real" me is inside of my cranial cavity playing operator. I'll also get this feeling during my clumsy moments where I forget where my limbs are and what size they actually are. These are really cool, interesting moments and the "HD goggles" analogy is totally spot on for me.