Why more Americans are learning to pick locks, bust out of handcuffs, and avoid surveillance.

It's a sticky Saturday morning and I'm handcuffed in the back seat of a Jeep Grand Cherokee parked on the side of a Philadelphia street. On one side of me is my boyfriend, Bruce, and on the other his best friend, Nick. Both of them are also cuffed—and like me, sweating like pigs. I reach into my hair and pull out a bobby pin that within seconds I've fashioned into a simple device I use to jimmy open my handcuff locks. Our assignment now is to evade 12 professionally trained trackers in a 25-square-block area for the next eight hours.

It may be hard to believe, but we asked for this. Actually, we paid for it: $550 apiece.

Today is the final day of a three-day "Urban Escape and Evade" course offered by onPoint Tactical LLC, a New Jersey-based company that teaches soldiers, police officers, and, increasingly, civilians urban survival skills.

Among the lessons we've learned are how to break through zip ties and telephone cords (the most common materials used as binding by kidnappers), smash a car window without making a sound, pick tumbler- and padlocks, puncture the tires of a pursuit vehicle with homemade caltrops, call for help using a ham radio, kill an attack dog—and, of course, how to escape from handcuffs. To make today's exercise even more difficult, we've been assigned a variety of missions that will test our newfound prowess in urban tactical maneuvering.

OnPoint, started in 2004 by Kevin Reeve, a 52-year-old professional scout and tracker, is the only school in the country that teaches urban tactical skills. In the past nine months, demand for the course has surged. For the first time, Reeve approximates his annual revenue to top $200,000—a fair sum for a business whose overhead consists largely of renting out space in community centers for classes and buying enough Goody bobby pins to prop up the coifs at a beauty pageant. In years past, Reeve said he barely pulled in enough revenue to make a profit.