  We consider gravitational collapse of a sphere of a fluid with torsion
generated by spin, which forms a black hole. We use the Tolman metric and the
Einstein$-$Cartan field equations with a relativistic spin fluid as a source.
We show that gravitational repulsion of torsion prevents a singularity,
replacing it with a nonsingular bounce. Quantum particle creation during
contraction prevents shear from overcoming torsion. Particle creation during
expansion can generate a finite period of inflation and produce large amounts
of matter. The resulting closed universe on the other side of the event horizon
may have several bounces. Such a universe is oscillatory, with each cycle
larger than the preceding cycle, until it reaches a size at which dark energy
dominates and expands indefinitely. Our universe might have therefore
originated from a black hole existing in another universe.
