Nothing gets the old ticker pumping like reaching under submerged rocks and into holes in the river bank hoping to feel something — like a big fish — snap shut on your hand. I used to know people who would do this in the irrigation ditches of New Mexico and Texas, and saw pictures of the huge fish they pulled out. There is a small ranch between Socorro and Truth & Consequences, New Mexico, that has a catfish head atop each fencepost around the ranch house. Catfish heads that were, on average, the same size as mine.