Here is a little example of the new cool feature in Adobe Premiere Pro CS3. Its called time mapping and personally i think its the best thing for wakeboarding videos. It lets you speed up slow down and reverse clips with out actually having to cut the clips. It always lets u created a curve so its not jumping from 100% to 70%, but going 100%, 99%, 98% etc... much smoother.
Check it out.
http://www.simplethoughtproductions.com/2007/09/26/cs3-premiere-time-remappig/