Brutal footage shows the Ukrainian 109th Mountain Assault Battalion dropping F1 hand grenades onto a squad of Russian troops resulting in multiple casualties. Unlike many of the improvised drone munitions made from modified projectile grenades with a point detonating (impact) fuse, these F1 hand grenades explode on a time fuse, so the pilot has to fly the drone at a specific altitude to ensure the time and distance of the fall coincides with the cooking grenade.