To manipulate the Reo into a suitable position, lure it to the left and crouch at the edge of the platform; jump as needed to bring it back on camera when it goes off; it should perform 4 big swoops down to the left, 2 small swoops (hitting the overhang above), then 5 more big swoops, after which it will enter a slow hover moving directly towards Samus. Then lure it down and to the right, making it pass through the morph tunnel. Samus' vertical position must stay below that of the Reo, in order to keep the Reo in its hover state.