The information in this book is designed to entertain only and is not intended as a practical guide for undertaking the pursuits described. Many of the activities presented are highly dangerous and involve serious risk of injury or death; they should not be attempted under any circumstances. Nothing in this book should be construed as advice or recommendation to undertake any of the activities. The author and publishers expressly disclaim any responsibility for any adverse effects arising from the use or application of the information contained herein.