  Type II Weyl semimetals are dictated by bulk excitations with tilted light
cones, resembling the inside of black holes. We obtain generic boundary
conditions for surface boundaries of the type II Weyl semimetals near Weyl
nodes, and show that for a certain boundary condition edge states can escape
out of the "black hole" event horizon. This means that for realization of the
material "black hole" by the Type II Weyl semimetals a careful choice of the
boundary condition is necessary.
