When i was growing up on my uncle's farm, a neighbor who lived in "The City" (short for Nu Yawk) always had friends up for the summer. we farm kids were always on the lookout for smart assed neophytes who might be ripe for a little educatin'.
One of our favorite tricks was an introduction to the electric fence. I spent a lot of time working around the cows and so at times i would be wearing rubber knee boots instead of the local custom for kids of going barefoot most of the time. We had a river dividing the property and, of course, there was a great swimming hole not too far from the barn. I would watch for kids to go to the swimming hole as it was visible from the barn. As I would see the either approaching or leaving, I would casually walk out to visit by non-chalantly stepping over the charged wire as i held on to it with one hand. since i was not grounded, i did not get a heavy jolt. A slight tingling, maybe, but not a hard jolt. The newbies would follow suit and as they were bare footed, would let out a yelp and go sky high as they got their surprise.
I would then explain to them that I did not get jolted because of my rubber boots and demonstrate by grabbing tight to the wire.
"Here, you try it with my boots on."
They would then find they could do the same with barely any feeling of the electricity. I would encourage to really hold on tight and as they increased the hand pressure, I would sneak around behind and put my hands on their back. :

;D ;D ;D
The other nasty thing we all would do was to get a couple of the city kids to ride out to the hay field with us. Now, as i mentioned above, we were all used to going barefooted most of the time and the bottoms of our feet were like leather. A new mown hay field is full of very short and stiff stubbles of grass that can be like hundreds of little drills to bare feet not already toughened up. As we would arrive at the field, those of us who had been toughened up would jump right off of the wagon while it was still rolling and start running. Those poor city kids would follow suite. The only difference was that as soon as they hit the ground, they would let out a yelp of horror as those spikes of hard grass did their job. By then the wagon was already several feet away and we told them to crawl on over to the wagon. Problem was, that sharp grass did not care whether it was the tender palms, knees or feet. It was all the same.
Ah, the lessons there were to learn, but it was far more fun to teach. ;D ;D ;D
Tinker