MANILA, Philippines--Known collectively as Parkour Philippines, these daring individuals have been posting videos on YouTube showing themselves traversing walls and jumping from roof to roof. Parkour, founded in France by David Belle, has become both art and sport for these young enthusiasts. INQUIRER.net multimedia reporter Erika Tapalla tags along with them and tries out a few tricks herself. Video taken at Rizal Park on Jan. 19, 2008.