Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fun tutorial to advanced whitewater kayaking technique

This is a quirky guide to whitewater paddling techniques which takes up where other guides break off. It is a lot of fun, helped immensely by the strip cartoon style and the author's humorous approach to paddling. Lots of good advice too, but don't expect a serious reference tome. If you want to learn basic paddling technique - forget it! Want to learn from a seasoned paddler's experience, this is well worth a read.