Comments by "" (@neutronalchemist3241) on "Drone drives 4 "insects" out of their “nest" with projectile and destroys them after chasing them" video.

It was a tunnel. Only the closest person had been hit. It would have been the same with any frag grenade. Anyway that was an F-1 grenade. Practically identical, in structure, weight of the cast iron shell and tnt filling (the F-1 has a little more actually), to the American Mk2 "pineapple" that you see in countless WWII movies.
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