Yep, those crazy parkour kids again. The 1st film was okay, not as good as it could've been, but this one looks to be more frantic & uptempo...
Luc Besson isn't attached, but the same director is..

YAMAKASI 2: Les Fils du vent Julien Seri2005
Parisian urban acrobats, known as Yamakasi, fight international organized crime in Thailand.

Talk about multicultural: In "The Great Challenge," you've got your Japanese Yakusa, your Chinese Triads and your multiracial sons of the Paris projects -- the famed "Yamakasi" -- on a visit to Bangkok where all the protags speak Parisian French. An improvement on 2001's "Yamakasi," which was morally bankrupt but made a bundle, this sequel finds the now London-based lads bound for Thailand to set up a gym....

Go to website & click on 'A Voir', that is the trailer: http://www.lesfilsduvent-lefilm.com/

[IMG]http://img.photobucket.com/albums/v282/idiotproof/pic_affiche2.jpg[/IMG]

and here's a Parkour website...http://www.screwgravity.com/

but check this superdope site with some real footage http://www.urbanfreeflow.com/urban_graffiti/urban_graffiti.htm