Shepard wrote the script and co-directed with David Palmer (Brother's Justice), constructing an ideal vehicle for the real-life couple's spirited banter.

There is a lot of boring Clarksonian chatter about motorcars, but, inhibited by a modest budget, the stunts prove to be depressingly unspectacular.

It's amiable, but the more miles it clocks up, the more this film looks like a vanity vehicle for its co-director, writer and star, Dax Shepard.

Hit & Run is very much hit and miss. The plot careers all over the place and a lot of the jokes definitely sputter, but with the laidback, goofy Shepard at the wheel, the film somehow keeps on the road.