There’s a hint in the closing credits of this documentary, a supposed ‘peek behind the curtain’ during the awkward production of Andy Kaufman biopic Man on the Moon, which lets slip that what we’ve just seen for the previous 90 minutes might not entirely be on the up and up. That’s not to say it’s fake, just that it’s not the film you thought you were watching.

And in hindsight, Jim Carrey — who famously went method during filming, not playing but being Andy Kaufman, or his absolutely-not-an-alter-ego Tony Clifton — doesn’t skimp on dropping hints to that effect, 20 years on. It’s as much a story about Carrey holding his persona at arm’s length from his true self, if such a thing even exists, as it is about his attempt to find understanding in his inhabiting a similarly misunderstood persona in Kaufman’s. There’s nothing fake about that.