When I took my hunters safety course (almost three decades ago) The instructors brought out and paraded around for us kids, some fine examples of blown up rifles. Quite a few where the classic split and curl variety that cartoons like to copy. Some were shrapnel bombs with large chunks missing. My point is that still to this day I have that vision in my head every time I go to the range. I'm not sure if needed that level of paranoia resting on me, but it sure has made me a careful shooter.
My pops used to reload .357 magnum cartridges at the dinner table when I was a kid. He was always careful in whatever he did. One time he blew a primer while ramming a case. We all about $h!7 when that thing went off. He sat there for a minute before looking at his hands. Nothing bad came of it though. Mistakes happen, but you gotta live before you die right? I figure if I buy the farm at the range on Sunday, I get the day off for sure on Monday!