Robert Downey Jr's friends still expect the former drug addict to lapse, five years after he claims he last took drugs.
The actor, 41, admits he still needs help, and relies on a huge support network.
Downey Jr says, "I can have the yoga teacher come to the door, and if I don't answer it and he's waiting outside for me, he goes, 'I thought you were f**king dead.'
"I am surrounded, like an MIT prodigy, with teams and squads of experts and supporters. How much support do I need? Uh, tons?"