BOOMERANG

A flat curved airfoil, that spins about an axis perpendicular to the direction of flight, that was originally used in various parts of the world as hunting weapons or, in returnable types, for sports or training.

A breakdancing move in which the performer walks on his or her hands while keeping the legs raised off the ground.

To return or rebound unexpectedly, especially when the result is undesired; to backfire.

To travel in a curved path.