Ever had one of those?
I went to bed around 11:30, exhausted as hell from my first week of class.  Okay, so I snacked on a handful of Raisinets shortly before I went to bed. 

 Maybe that's the culprit?
Fell asleep fairly quickly but was in a half-awake state where I became aware that the arm under my pillow was asleep.  I closed my eyes for what felt like a second but I did dream something I can't remember and heard the doorbell ring.  My doorbell has a somewhat distinctive sound.  And it wasn't one of those moments where, say, a sound in your dream turns into the sound of your alarm or your phone ringing. So I checked my phone (it said 1:00 a.m. on the dot, BTW) which is on the nightstand next to the bed.  No pins, no messages, nothing ringing.  My heart starts pumping and I grab this hunting knife from my nightstand and look outside the front door.  I check the back windows.  Nothing.  Not a sound, not a peep.  I turn on a couple of lights inside the house, thinking if they came to burglarize the house, that'll scare 'em away.  I don't want to call anyone and wake them up; those I love and trust are very old 
So I'm killing time at TFP until my heart slows down and I feel safe.  No kids this weekend, so I'm all alone, being ever so brave with the knife beside me.
At this point, I doubt that anyone rang the doorbell.  But it did seem so real.  Ever have a dream scare the bejesus outta ya like that?