The Boomerang Bloon is a Bloon that, once popped, gives the Dart Monkey a Boomerang, turning it into a Boomerang Thrower. The Boomerang will go in a straight line, then eventually loop back to the monkey. However, similarly to normal darts, the boomerang can be impeded by any regular obstacle like a wall. This most likely inspired the Boomerang Thrower that appears in the series Bloons Tower Defense.