I’d count it as a miracle to be honest
Grenades and hand thrown bombs date back to ancient China and medieval Europe. Grenades were somewhat common in the 17th and 18th century. In fact the type of infantryman called the “Grenadier” was a soldier who specialized in handling grenades. This later changed to elite soldiers who were especially tall.
Grenades were simple affairs, hollow cast iron balls filled with black powder, shrapnel such as nails and pellets, and rigged with a fuse.
There were two main types of grenade launchers, the first of which was the hand mortar, which was a gun in itself.
Then there were grenade attachments for muskets, kind of like the modern rifle grenade today.
Like modern grenade launchers, 18th century and earlier grenade launchers were not aimed directly at the target, but fired in a ballistic arc towards the enemy.