Did this tandem when i was in turkey a few years ago, one of the best things ive ever done, an awesome feeling running off the edge of a cliff 8,000 ft up, then just sit back, relax and enjoy the view, then the bastard did a spiral dive on me, awesome feeling but scary none the less, dropping about 2 thousand feet in seconds, would easily do it again though. My ex's dad does it as a hobby, goes up to all the peak districts etc, have fun mate