Unlikely action film star Jason Statham, who moves rather effortlessly from heroes to heavies in choosing his screen roles, returns as mercenary transport specialist Frank Martin in this wildly improbable but entertaining sequel. This time around, Frank is acting as driver for a powerful government official (Matthew Modine) whose young son (Hunter Clary) has been targeted for kidnapping by narco-terrorists. Initially reluctant to get involved, Frank is moved by his fondness for both the boy and his mother (Amber Valletta), who begs the former soldier of fortune to rescue the lad. From that point there's barely a let-up in the action, which includes some of the wildest fight scenes and chases ever committed to celluloid. Director Louis Leterrier, who assisted Luc Besson on the original Transporter, relies on the exaggerated visual stylings of Hong Kong action specialists, choreographing extravagant martial arts fight sequences along the well-established lines of the early Jackie Chan and his heir apparent, Jet Li. The fights and chases manage to violate practically all the laws of physics, but why quibble about minor details? Once the adrenaline starts pumping you won't be concerned about such trivial matters. Simply plotted and unapologetically manic, Transporter 2 moves like a runaway train -- and once onboard, you won't be able to catch your breath till it runs out of steam.