It's not possible easy to leave once you reach it's event horizon.
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Cerebus Regrets nothing!, Fri 30 Nov 2012, 10:43,
Reply)
I heard the best plan is to accelerate directly towards the centre,
so the combined acceleration forces you through and out of its "twin" the other side, though you may suffer some serious time dilation and possibly pick up some debris and hitchhikers from Hell as you pass through.
(, Fri 30 Nov 2012, 10:57, Reply)