New Jersey skydiving mecca pushes extreme sport to new heights.(Freefall Adventure Skydiving School at Cross Keys Airport)

Byline: Wendy Ruderman

WILLIAMSTOWN, N.J. _ There are two types of people in the world: those who wouldn't dare jump out of an airplane unless it were on fire, and those who fling themselves out of one at 14,000 feet _ sometimes naked _ for the sheer thrill of it.

From now until the weather turns cold, hundreds of high-octane personality types will converge each weekend on a small South Jersey town known around the world as a skydiving mecca.

With yelps, screams, and an occasional "whew-whoo!" skydivers flutter from the skies above Williamstown in Monroe Township, N.J., 30 minutes from Philadelphia. The town is home to Freefall Adventure Skydiving School at Cross Keys Airport.

"In the summertime, this place rock-and-rolls," said Jeff Frederick, who helps manage Scotland Run Golf Club, where golfers can begin their game by skydiving onto the first hole.

Skydivers fall at 120 miles per …