Definitely the dust bunnies.  No room for any survival stuff - I've got an 1986 queen sized waterbed that I refuse to give up!  

  I'm on the second mattress btw.
It definitely pays to have some sort of footwear beside the bed.  In the event of an emergency like a house fire - having something on your feet can make a huge difference!  Before my eye surgery, when I had the "coke bottle aids" - having a set of eyeglasses by the bed was an absolute MUST!