// targetRadius defines how far to look for enemies
    action void ShootEnemies (double targetRadius) {
        if (!target)
            return;

        let it = BlockThingsIterator.Create (self, targetRadius);

        while (it.Next () && it.thing != null) {
            let act = it.thing;

            if (!act.bIsMonster && act.player == null) // Skip if not a monster
                continue;
            if (!act.bShootable || act.bNonShootable) // Skip if the monster can't be shot
                continue;
            if (act.bDormant || act.bInvulnerable || act.bNoDamage) // Skip if the monster is dormant or invulnerable
                continue;
            if (target.IsFriend (act)) // Skip if the monster and the shooter aren't hostile to eachother
                continue;
            if (Distance3D (act) > targetRadius) // Skip if the monster is further than targetRadius. *Shouldn't* be necessary, but who knows.
                continue;

            // Yep, this is a monster, so shoot at it.
            A_SpawnProjectile ("DoomImpBall", spawnheight: height / 2., flags: CMF_TRACKOWNER, ptr: AAPTR_Tracer);
        }
    }