I just experienced the most traumatic moment of 2014. Our couch's two spots can be turned into laying position, and to get it back into sitting position, you have to "kick it inside".
I never get it "inside" well enough, because you have to use lots of strength to do it --> I kicked it in and got up from the couch --> the bottom suddenly went back to the sitting position HARD, and I flew over because it hit my legs XD