Good Hump day morning.
As a kid I was much like a smaller version of me now, always wanting to know how things work. That was back in the stone ages and TV repair shops were in every shopping center and every grocery and hardware store had tube testers. There was a TV repair shop just a few hundred yard from our house. I am sure I was a pest but the "old" man (likely over 55 years old!) wast patient with me and let me watch and he was probably distracted by me. He discharged the capacitor from the tube right into his arm. It blew him backwards across the room. For some reason he started cussing and I learned a few new words. I was always VERY careful around TVs when replacing tubes after that.