  Electrons in Type II Weyl semimetals display one-way propagation, which
supports totally reflecting behavior at an endpoint, as one has for black hole
horizons viewed from the inside. Junctions of Type I and Type II lead to
equations identical to what one has near black hole horizons, but the physical
implications, we suggest, are quite different from expectations which are
conventional in that context. The time-reversed, "white hole" configuration is
also physically accessible.
