Following the thread I tried to get my 172 to spin, after checking the POH which does allow it. I was surprised how hard it was even to start the spin and found that even with full tank I only had to let go controls to end the spin - no action necessary from my side. Do not rely on it! This is just my observation from this single try, though! Good training and nice to know now, but now comes my question: is there any 172 known to be lost by a spin?