Urban BASE jumping: World's most dangerous sport just got more dangerous

An escalating trend in urban BASE jumping - illegal in most cities - is worrying some who say such risky stunts are tarnishing the image of the extreme sport.

Just before midnight, a man climbs onto a ledge on the 21st floor of a building in southwest Paris and leaps off. Mere seconds later, he opens his parachute – all part of the thrill of BASE jumping.