Electric fence
We all lined up for a turn touching the electric fence. The lining up was part of the bravado: pushing to go first, or laughing to show you weren't scared while the boys in front of you shrieked. When it was my go, I laid my hand on good and firm, thinking it wouldn't hurt any more, but I'd impress the others. I felt nothing. The fence was dead. But I yelped and snatched my hand back all the same.