Jumping out of a perfectly good airplane...
We went tandem sky diving while we were in Maine last week. I wasn't nervous about it at all until we actually got to the door and I was looking at the earth 14,000 feet down! It was an amazing experience and we'll do it again - maybe in Moab, should be some incredible scenery.
But don't ever tell your tandem jump partner that he can do whatever tricks he wants. That's a very bad idea! Free fall tricks were fine, but corkscrewing once the chute has opened... I was miserable for 2 - 3 hours afterward, essentially sea sick, which never happened to me when we were sailing. Missed out on some good ice cream from one of the local places too. :(
Veronica