Never use an aqua bag to shoot underwater! They're cheap but a nightmare to submerge and this one let in water. On the upside, it was realistically the only way we were going to shoot this and once the camera was in position we got some great shots. The actors were extremely patient and fortunately, good swimmers. The artist makes a Hitchcock cameo, notably on a tricycle. Shot on HD and with the skill of a colourist I was really happy with the end result.