Three cowboys are sitting around a campfire, out on a lonesome Texas prairie, each with the bravado for which cowboys are famous. A night of tall tales soon begins.The first cowboy says, 'I must be the meanest, toughest cowboy there is. Why, just the other day a bull got loose in the corral and gored six men before I wrestled it to the ground by the horns with my bare hands.'The second cowboy can't stand to be bested.'Why that's nothing. I was walking down the trail yesterday and a 15- foot rattlesnake slid out from under a rock and made ...