Three A.M.... Doctors say the body's at low tide then. The soul is out. The blood moves slow. You're the nearest to dead you'll ever be save dying. Sleep is a patch of death, but three in the morn, full wide-eyed staring, is living death... and wasn't it true, had he read somewhere, more people in hospitals die at 3 A.M. than at any other time..
— Ray Bradbury, SOMETHING WICKED THIS WAY COMES