@OP
Look it this way, even if suddenly having that accurate worry at the right time is down the sheer co-incidence on a million to one chance, in a world of six billion people that still means it's going to happen to six million people out there somewhere, and you happened to be one of them.

And it doesn't matter that your didn't feel worried for him; you have no idea whether or not your subconcious was worrying without you being aware.

All it's going to take is another instance perhaps ten years from now where you wake up terrified again...and nothing bad has happened. Then you'll know that, the world over, millions of people are waking up terrified in the middle of the night for no reason whatsoever, just because their subconcious dreaming thoughts got a bit muddled up...and a very small number of them will find that something in reality has matched up with their nightly terror...while the other 99.99% of them fall right back to sleep.
(Musuko, Sat 5 Jul 2008, 19:49, Reply)