Why is it that when we die in our dreams, it feels like we are falling?

Question: Why is it that when we die in our dreams, it feels like we are falling?
- Keywords:
  die,
  dream,
  fall
Asked by hannahrice to Damien, Rachael, Simon, Suzi, Tim on 15 Jun 2011.
- Suzi Gage answered on 15 Jun 2011:
  
  Hi @hannahrice
  
  I have no idea I’m afraid. Is this always true? Sometimes I’ve had dreams where I’ve died but I haven’t felt like I was falling, and sometimes I’ve felt like I was falling but I hadn’t died in my dream.
  
  So I don’t know I’m afraid, sorry I can’t answer your question 🙂

Question: Why is it that when we die in our dreams, it feels like we are falling?