It depends on which excursions you're talking about. Did you book them through your ship, or do you know what company it was? I went on a Canopy Tour that did about 14 zip lines and a rappel at the end, but it was only about 30 feet up. Another excursion offers a couple rappels. If you can give us more details of your choices, we can give you a better answer. Thanks!
Carnival Spirit - Exotic Mexican Riviera - January 9, 2008
Carnival Pride - Mexican Riviera - August 5, 2007