If you fly the plane like you know how, you will not stall the plane. Tree tops absorb impact nicely, I have pulled several planes from trees for insurance companies and all of them the people walked (climbed) away from. Tree trunks when running into the end of a field is another matter, boughs bend, trunks stay solid.
I am no where advocating stalling the plane, I am advocating having a mastery of the plane so you can confidently fly it as slow as it will fly, and have the experience to be able to judge the approach. There is no safer way to practice this than in the bloody traffic pattern unless you can get on a Class D sim or something. There is no great risk unless you are flying an exotic speed demon or piece of flying antiquity. The planes most people learn in do not fall out of the sky out of control at the first buffet of stall, they just increase their sink rate, IMO a much safer, better for accuracy, way of increasing sink rate than slipping which makes your adjusted glide perspective harder to judge, or pointing the nose down and picking up energy you will have to lose again. I read somewhere that more engine out approaches go wrong long than short. If you have a working engine and are in a pattern that allows a direct engine out path to the runway; you are at no great risk. Get a sink burble in the air? Give it a burst of a few hundred RPM to add some energy back. Feel some buffet in the yoke? Give it a couple milliners of yoke back to reduce your AoA out of buffet. If you have the plane trimmed properly, you will feel it in your fingertip and thumb before anything ever happens.
BTW, Skully was in a Fly by Wire Airbus wasn't he? If so, that system is amazing, all he would have had to do is hold the stick all the way back centered and the plane would manage the sink and speed as well as keep the wings level. If it's similar to the system the AB 340 from AF 447 used, it's an incredible control system.