Only a few things help to shake me free of those silly hangups. Music is a big one. The right song at the right time really sets me straight. Field time is another. On an average day, the quarter-inch grease stain the mechanic left on my driver's seat upholstery seems like a towering injustice that signals the end of all that is good and decent in this world. But on a day in the woods, well, I can think straight. When the tree I'm sitting under has survived a zillion years of storms, winters, floods, wars, and untold natural abuses, what does my Volkswagen upholstery matter?