OK, way past getting in trouble on these:
1. Flying CAP (Don't ask, and not doing it anymore) with a non-pilot in the right seat, on a real long sortie: I put my head back, closed my right eye, dropped my hand from the yoke and pretended to be dead/unconscious. He didn't take it well, and I may have let it go on a bit too long. He was over-controlling in pitch, but not doing too bad in keeping the wings level. I came clean when he started mucking with the comm panel and babbling on the FM.
2. Two young 1LTs, buddies, in a C-130E, night flying; after a bunch of approaches, we were on short final - the co-pilot yells "Light fight!", and beams the pilot in the eyes with a very bright flashlight. C-130's straighten themselves right out when touching down in a crab, I mean that tandem gear snatches the airplane right back into alignment with the direction of motion.
Knew the payback was coming - they swapped seats, and maybe an hour later, just before touching down, the previous victim asks the "flasher", real innocent like, "Did you want the gear down?" - A lightly loaded 130 is impressive on a go.