I used to take flying trapeze lessons at the Toronto School of Circus Arts. http://www.torontocircus.com
It was a lot of fun, although I wasn't very good (at 6'4" and being all arms & legs, I kind of looked like Grover from Sesame Street calling for "Froggie Baby" to come & get me down). I did learn to perform a couple of tricks adequately though. Unfortunately I suffered some injuries to my shoulders (bad technique on my part) which has never fully healed, and to my knees (due to weak ass muscles -- it's a long story), so I had to give it up. Still, it was a lot of fun. Maybe one day I'll try it again.
I also wanted to try the silks, which I was told I would look good doing because of my long legs. Unfortunately I never got to try that (as apparently it was really tough).