[JumpCrisscross]

> I can see birds, dogs

One can hallucinate all manner of things.

When you see a bird, you're perceiving neurochemical impulses produced by photochemical interactions triggered by photons absorbed and emitted by a series of atoms between you and the surface of the bird, itself stimulated by a similar cascade likely originating in a nuclear reaction that happened a hundred thousand years ago in the core of the Sun. (Also, we're playing fast and loose by referring to the surface of the bird as a singular plane, but we can't go full Cartesian because it's a Friday night.)