The nearest I have come to a PFL turning into a real forced landing was in a Piper Cub. My student turned the fuel to off instead of changing tanks during the re-start drill. I had no inkling until we opened the throttle to go around, at which point the engine stopped. An awkward situation, because I could not see or reach the fuel cock from the back seat. Fortunately the student was a good one and we managed to get the problem diagnosed, the fuel back on and the engine started with about 100 ft to go.
Had the engine not started we would have made the target field, but I suspect we would have ended up in the far hedge.
I learned a big lesson from that one - touch drills only during ex 16.