I am thinking @sandworm is talking about the old round iron cannonballs (akin to those fired from pirate ships etc) rather than the more modern explosive projec

I am thinking @sandworm is talking about the old round iron cannonballs (akin to those fired from pirate ships etc) rather than the more modern explosive projectiles that are shown in your video post. That also reminds me of another story I read that was penned by a cavalry officer in the 1800's. He said that the only time you could see a cannonball in flight on the battlefield was when it was pretty much heading straight for you. He recalls an incident once when he met a fellow horseback officer in the middle of a battlefield during a lull in combat, and while talking, the other officer's horse rested its head against his leg. While chatting, he noticed a black blur approaching in the sky out of the corner of his vision and reactively flinched back, and a cannon ball brushed his collar and smashed into the horse's head that was leaning against his leg, instantly killing the poor creature.