A boomerang that would comeback after throwing it would be great. It would leave your player model after throwing, but keep an inventory slot taken up, so that you couldn't pick up something new on accident. It would also only return if you stayed in place, otherwise it would just fall and you'd need to pick it up again. If it hit an exterior or part of the terrain, it would just drop, not return. Players, bots, and vehicles, however, it would still return from. It would do low damage.