The book _All These Earths_ by F. M. Busby consists of four stories involving an FTL drive which, at the higher "Skip Factors," has a chance of "Drifting" the starship into an alternate universe -- with very little (make that *extremely* little) chance of ever returning to the original.
In the first story, one universe finds this out when two versions of a starship arrive at the same starport. One of them belongs there -- it _didn't_ Drift. The two essentially identical captains meet (after the situation has been explained to them), look at each other, and one says, "Do you suppose our wife will agree that you can't have too much of a good thing?"
DHBirr
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Big Brother is watching you. And damn, you are so bloody BORING.
In the first story, one universe finds this out when two versions of a starship arrive at the same starport. One of them belongs there -- it _didn't_ Drift. The two essentially identical captains meet (after the situation has been explained to them), look at each other, and one says, "Do you suppose our wife will agree that you can't have too much of a good thing?"
DHBirr
-----
Big Brother is watching you. And damn, you are so bloody BORING.