It must have seemed like a good idea to turn One Flew Over The Cuckoo's Nest into a street-dance show.
Ken Kesey's tragi-comic book, which sparked Milos Forman's Oscar-winning film starring Jack Nicholson, features enduring ideas about human rights and societal wrongs, while street-dance ticks all the right boxes - it's youthful, accessible and mildly subversive.
What no one stopped to think is that although street-dance is brilliant to watch, it lacks dramatic range. It works best when it is simply itself, which is a daring display of strength and speed and dexterity.
The problem for the Stockholm dance-theatre troupe Bounce, and they have quite a few, is that they don't have a choreographer or director who can convert the moves into convincing theatre.
Insane In The Brain, a title borrowed from the Cypress Hill hit that features in the show, is no more than a series of so-so dance routines that could be about anything.
Actually, it's worse than that. Cuckoo's Nest is about mental illness and what it might be, as well as the terrifying ways it used to be treated (drugs, electro-convulsive therapy, lobotomy). That passive-aggressive nurse and the man who feigns madness to get off prison should worry away at you.
No one expects a show aimed at the young to be quite as bleak as the film but equating youthful rebellion with the horrors of mental hospitals is just silly.
It also offers a muddled narrative, fussy action, only average dance routines and some truly woeful acting. Most misjudged is the Nurse Ratchet character who looks cross rather than the menace she is.
An unexpected highlight was a film sequence of Edwardian toffs hip-hopping away. I can't think how it relates to Cuckoo's Nest but it was very funny. Bounce should stick to this.
Until 16 March. Information: 0844 412 4300. www.sadlerswells.com.
Bounce: Insane In The Brain
Peacock Theatre
Portugal Street, WC2A 2HT
