I waited. Nothing. I looked over at my husband. He was sound asleep. Had it really happened, he would have heard it and been up in a flash. So I dreamed it. But it was only that...just a loud, insistent knocking/pounding. After my heart rate returned to normal, I made a mental note to look that one up, and then went back to sleep.
According to The Dream Book by Betty Bethards:
Knock = Pay attention to what you are doing; opportunity knocks.
Or in this case, pounds. I'm not a very good listener apparently. So between the dream from yesterday about a snake, and this one about knocking, the only clear idea I have is that I need to be aware, and pay attention and be open, and listen and see what comes.