This comedy would seem quite ordinary if it weren't for its preposterous premise.

Robbie Coltrane discovers an ancient Aboriginal pickled head that can forecast horse-race winners (no joke).

But the Australians want their head back and Coltrane has to stall them long enough to get a Grand National tip so he can send his daughter to college.

Dan Aykroyd and Brenda Blethyn co-star.