  The Einstein-Rosen "bridge" wormhole solution proposed in the classic paper
[1] does not satisfy the vacuum Einstein equations at the wormhole throat. We
show that the fully consistent formulation of the original Einstein-Rosen
"bridge" requires solving Einstein equations of bulk D=4 gravity coupled to a
lightlike brane with a well-defined world-volume action. The non-vanishing
contribution of Einstein-Rosen "bridge" solution to the right hand side of
Einstein equations at the throat matches precisely the surface stress-energy
tensor of the lightlike brane which automatically occupies the throat ("horizon
straddling") - a feature triggered by the world-volume lightlike brane
dynamics.
