admittedly the explosion is rather weak, not much more than a cherry bomb. but with the arrows being energy they don't have a fuse and instead just explode when they contact solid matter. so realistically there is a chance that kicking dirt up in the air could set it off if it passes through enough dirt to register hitting it. the explosion is focused on where it hits rather than most of it being spread out which makes it able to punch through some armour if it hits right.