We bought a 1963 fastback, straight tail 150 for learning to fly. My designated flight examiner had me put in partial flaps, then pull up into a stall, and I obliged with a sharp pull up. The left spin started so quick I was aghast. I instinctively mashed right rudder and recovered in less than one turn. I said in surprise, "What happened?"
He explained as he was signing me off later that the early 150 would do that with partial flaps if you weren't really on top of the rudder controls. It taught me a lesson.
Wife still hasn't forgiven me for selling "her" plane to buy a Bellanca Cruisair.
GB