This video would be great for training a less experienced person. I don't know how long I had been shooting before I heard of a squib. I (un?)luckily experienced one when I first started reloading. I say "un?" because using a brass rod to tap out the squib was not what I wanted to be doing at the time, but it WAS a good learning experience. I am glad that I now know what it sounds and feels like. I am hoping I will be able to catch it if it happens again to myself or others.
While my squib was with one of my very early reloads, I have heard of a surprising number of squibs with quality brand name manufacturers. Many speculated that it was a result of the manufacturers working around the clock to get caught up with the most recent panic. Not sure if that is true, just speculation.
Fly