When my ex and I were still together (back around 1989), she expressed an interest in learning to shoot. I picked up a Taurus 94 revolver to teach her with, and out to the scrubland we went. I told her that, since it was a new gun, I'd put the first nine rounds through it to check the sights, then turn it over to her. Using two-liter bottles as targets, I was able to hit them pretty much all of the time from about ten yards. I reloaded the gun for her, and she took over. Nothing. Nada. Couldn't even see bullets hitting anything, not even the ground. I reloaded again, took another turn myself, and did as I should have. More holes in the bottles. Reloaded for her, and again, those bottles just stood there, further unscathed.
Just as she was becoming a bit dejected, I clued her in on that it was the first of April, and I was having a little fun with her. Each time I loaded the revolver for her, I was loading it with blanks. She was a good sport, and went on to have quite some fun with that gun, my 10/22, and live ammo..