I once had a premonition in a dream the morning I was to catch a flight with many of my family. I saw and heard countless numbers of panicked people trapped within a confined area screaming in pain and anguish. It was terrifying and I could not go back to sleep.
I caught the flight anyway, but remained awake the entire journey from Massachusetts to California, finally returning home around 3:30 AM.
Although exhausted, I forced myself to stay awake long enough to call an aunt at a more reasonable time to have her spread the word we had all arrived home safely. Ten minutes after the call the first plane hit the WTC. True story.
I remember reading about the Titanic and the number of people who suddenly decided not to go on that ship and were made fun of at first for not going on the "unsinkable ship".