Who hasn't dreamed about running away to join the circus? Practice for that adventure to come at Trapeze Arts in Oakland, where owners Stephan and Lili Gaudreau and their talented staff -- professional circus performers all -- teach both adults and kids to trounce the trampoline, accomplish the aerial arts, and swing by their knees on the flying trapeze (over a net and with a harness, of course). Instructors are well versed in providing gentle assistance to the fearful flyer (in fact, there's a whole section on their Web site devoted to "Fear"), so students can literally put themselves into capable hands. Take your pick: Trapeze Arts offers group classes, private instruction, weeklong camps for kids, birthday parties, and corporate team-building exercises. Whatever your age and experience, there's no excuse not to chalk up and get jiggy with it.