Verdict: Making the sublime banal.
The 1939 James Thurber story The Secret Life of Walter Mitty occupied just two pages of the New Yorker magazine. A miracle of comic understatement and concision, it does not necessarily prove Shakespeare's maxim that brevity is the soul of wit, though it's a powerful argument in its favour.
The new film version, directed by its star Stiller, is an equally powerful argument that long-windedness is the soul of witlessness. A riot of CGI tramples a thin storyline that, in essence, is like one of those personal training videos that bellow "you can do it" at people who probably can't.
Thurber created a henpecked, daydreaming husband, sent to buy rubber overshoes while his wife is having her hair done, who fantasises being respectively a fighter pilot, surgeon, crack shot and soldier hero. A 1947 adaptation, which Thurber himself scripted, made it a memorably amusing musical vehicle for the versatile genius of singer-comedian Danny Kaye.