My very first ME lesson, 150 hp Apache, after about 30 min of airwork to aquaint me with the airplane, the grizzled old instructor reaches over a slaps the right mixture back to kill the engine. We do about 5 min of SE work, then the cyl temp on the left starts getting pretty high, and he decides to re-start the right. It won't. Tells me to head for an airport about 15 miles away, so I'm flying and he's cussin and messin with the controls of the right engine, still trying to get it to fire. I'm in a slow descent to arrive at pattern altitude and to cool the left. Finally, on short final, he gives up and I land, taxi to the ramp. He opens the cowling, still cussin a blue streak, and finds the mixture control broken at the carb. We found a small piece of safety wire on the ramp, wired that sucker full rich, took off and flew home... (He was an A/I, and I was a dumb 17 yr old kid)
So my first ME lesson ended with an actual SE landing.
I had another Apache engine quit on me years later just as I rotated for TO. Thankfully. If I'd been 50' in the air, and out of runway, that would have been real interesting.
Had the mixture control in a C-150 come out in my hand once, but I just pushed all the pieces gently back into place, and it kept running. Student landed while I held the parts.