Co-star David Belle’s nifty Parkour moves are the real star of the show.

Walker’s incorruptible cop Damien and Belle’s Lino team up to enter a lawless, fortress-like housing project in Detroit, thwart the bad guys and defuse a neutron bomb.

Satirical swipes at cynical, big-city politics have all the subtlety of a poke in the eye in this crass, cartoonish fodder.