The Burton Taylor Theatre, beside the Playhouse, regularly houses some of the most innovative theatre to be found in Oxford. I often think of it as our own miniature version of the Edinburgh Festival Fringe. The surreal theatre company Gonzo Moose underlined this on Saturday when they arrived, welcome visitors, as part of their whistle-stop national tour.

The intriguingly titled You Don't Need to Know That was a wildly imaginative show on the Kafkaesque notion of a man waking to find he is charged with a crime but none of the judicial authorities will explain what he has done wrong. This show brings out all the absurdist humour of the crazy situation, while also being rather moving as the hero, Beresford, played with gentle humour by Mark Conway, is rather an everyman figure. His co-performers, Angus Barr and Claire Thomson, play lots of different and, most crucially, well-differentiated characters. To each they gave a unique brand of craziness, as none of the characters apart from the hero and his girlfriend are in least bit sane.

Yet crazy doesn't have to mean indulgently silly, and though the show is devised it is well crafted. The script, written by the three performers and director Abigail Anderson, is tightly structured and very funny. Excellent direction from Anderson keeps the performers on track. The set design is pure genius - five filing cabinets and a table become everything from corridors to law courts, libraries to escape tunnels.

Pleasingly, this play is suitable for all ages. Indeed its high-energy and madcap humour was very appreciated by youngsters in the audience. Frances, ten, told me she thought It was very funny and lots of surprising things happened. I would heartily agree with that.