Open-air flight over the Falls from the Zambian side — nothing between you and the view.
Unlike the enclosed helicopter cabin, the microlight is open-air — you sit behind the pilot with nothing but the seat harness between you and the view. It runs from the Zambian side, so you'll need your passport and to factor in the border crossing if you're staying on the Zimbabwean side.
Cameras and loose items generally can't be carried on board given the open cockpit — ask about photo packages offered by the flight operator. Bring your passport for the Zambia crossing, and check your nationality's visa requirements in advance.