Tic-toc

From RC Helicopter Wiki

A 3D manoeuver; the elevator tic-toc consists approximately of starting with the helicopter pointing vertically upwards, apply back cyclic pitch and positive pitch to push the helicopter over, apply negative collective pitch to stop the helicopter dead, and then apply negative pitch and forwards cyclic to push the nose around in a short arc while ideally keeping the end of the boom stationary. Apply positive pitch to catch the helicopter again, and repeat the procedure to maintain the helicopter's altitude and position. Essentially, a tic-toc consists of transitioning quickly between part flips.

A variation is the aileron tic-toc.