Those things scare me. My mother had one explode on her sending freshly snapped green beans all over our kitchen and the lid into the kitchen ceiling before returning to hit my mother. She recovered just fine. We found dried green beans in drawers and cabinets for a year after it happened.
Yes, they 'scare' me enough that I won't let anyone else in the kitchen when I use it. In my early teens one blew up in our home with beef. We kids joked that we could live for months just pulling the dried beef off the walls.
I still have used one myself these past 30 years. I just follow the directions and keep it well cleaned and maintained.