"There is budgetary pressure, there is deadline pressure all that things and I joke around that 'I eat pressure for breakfast bring it on'. And you have to fortify yourself with that kind of mantra... But really the truth of it is that if it wasn't joyful and if it didn't feed an artiste creatively every single day, it wouldn't be tolerable and I wouldn't have done it (made it) again," said Cameron, who became the first person to do a solo descent to the bottom of the Mariana Trench, the deepest part of the Earth's ocean, in the Deepsea Challenger submersible.