You know that feeling you get at the end of a gig, when the band reaches their crescendo and everyone around you goes absolutely mental for three minutes? It’s always that one song that everyone knows, and even the previously timid bloke beside you is leaping around like Jedward. Imagine seeing something where every single song captures that feeling, the euphonious surge of crowd emotion. That show you’re imagining? That’s Gregory Charles: Music Man.

This insanely talented performer with an encyclopaedic knowledge of music, is joined by his band of equally accomplished musicians to form a fully interactive show. It’s essentially a huge jamming session, with requests taken at random and songs mashed up without rehearsal.

Charles messes with his companions, leaving them to work out what song it is that he’s playing before they can join in. He’ll have ideas and segue into song after song with no break or thought: the music they make is intuitive. The band are like a flock of birds, each sensing an upcoming chord change or mood swing. They are at pains to prove that this is not a well rehearsed gimmick, and I imagine that by the amount of repeat business they seem to have it’d be impossible to get away with a sneaky trick like that.

The show is simply incredible, with half the audience dancing on their chairs by the third song with the rest assisting on vocals. You are swept up, buffered about and when Charles finally puts you down it takes rather a long time for the giddy excitement to fade.

Genius. Absolute, unadulterated genius.