This is a show about nothing. There is no plot, no profound truths and no personal revelations. All of which results in a refreshing hour genuinely unlike anything else at the Fringe. Ikechukwu Ufomadu plays, or perhaps is, an uncanny resurrection of a 1950s light entertainer, a man quite possibly possessed by the spirit of Johnny Carson. He has a fantastic voice, in both the literal and figurative sense. Without any reference, his voice morphs at various points to those of Michael Caine, JFK and Louis Armstrong, before subtly shifting back to his original persona. Members of the audience are confounded and entertained in equal measure.

The actor and comedian is making quite a splash back in America and is part of the same New York comedy scene that has recently produced boundary-pushing acts such as Conner O’Malley, Jo Firestone and Joe Pera. But here in the UK, he’s relatively unknown. Thankfully, this doesn’t mean that he’s watered down his act to make it more accessible. At one point he recites the opening of Moby Dick. At another, he croons his way through the alphabet and there’s also a garbled sonnet by William Shakespeare (‘the Shakespeare of his day’). It’s bizarre, bewildering and at times almost unsettling, in the most enjoyable way possible.

This show will clearly not be for everybody. Two fellow reviewers were scribbling furiously with unceasingly dour expressions on their faces. In fact the room was split roughly down the middle between people loving every moment and others unsubtly checking their watches. But if you’re in the right mood, this absurd delight could well be your highlight of the Fringe.

Amusements By Ikechukwu Ufomadu, Pleasance Courtyard, until 27 August, 5.40pm.