WHEN YOU GROW up in a small town in the north woods, you have to make your own excitement. High spirits, idiocy, and showing off for the girls inspire Gary Paulsen and his friends to attempt:<br><br>• Shooting waterfalls in a barrel<br><br>• The first skateboarding<br><br>• Breaking the world record for speed on skis by being towed behind a souped-up car, and then . . . hitting gravel<br><br>• Jumping three barrels like motorcycle daredevil Evel Knievel, except they only have bikes<br><br>• Wrestling . . . a bear? <br><br>Extreme sports lead to extreme fun in new tales from Gary's boyhood.<br><br><b><i>A</i> New York Times <i>Bestseller</i></b><br><br><br><i>From the Hardcover edition.</i>