On a single breath of air, Guillaume Néry explores the deepest pool in the world in Italy: Y40.
The action is filmed on breath hold by his wife Julie Gautier.
"We are trying to have a new approach to underwater films. I like to play, walk, run, jump and fly underwater, you won't often see me just swimming and that's why I don't use fins," he confides.
"I feel like I'm floating in space, without gravity."