In Thing Thing Arena 3, how do you get the weapon achievement Bloody Footprints?

I have no idea how, and none of the sites explain. PLZ EXPLAIN FULLY, cuz "10 foot shots" doesn't tell me if i gotta get shot or if i shoot enemies.|||u gotta shoot 10 enemies in the foot with the bowgun or the crossbow whatever its called.Shoot 10 of the enemies in the foot with arrows