I know a beloved cat that was killed after it went into the space under a fold out couch while the fold out bed was open. The cat's owners unwittingly closed the heavy metal fold out bed into the sofa and killed their own cat. Imagine the horror. I hope all beware that after company visits and sleeps on the fold out couch that they not close it on their own but wait till you make sure the cat isn't hiding under there.
Sad story, hope it prevents further accidents.