Oh, there was this one time when I was like 9 or 10, and I had a false awakening, so I went up and walked down the stairs, and
1. I noticed a black cat on my endtable, even though we didn't have a cat back then.
2. The cat magically turned into a hag (like in Disney's Snow White) and followed me down the stairs.
3. The hag had a minigun.
4. I held up my foot as a shield and she shot me in my heel.
This made me wake up and feel a strong pain in my heel. Turned out I hade kicked my leg in my sleep and hit one of the corners of my endtable :P
Now when I look back at this, I feel really frustrated that I didn't notice any of these very obvious dreamsigns :P