Ah, how the once mighty have fallen. Keith, he of the too-low pants and, um, casually inventive vocabulary, went toe to toe with the Sultan of Spite and was brutally knocked down. You don't try to take on Gordon Ramsay, especially not on his home turf. Maybe in the line for Pink's (where of course there is no Gordon Ramsay hot dog). But in the fiery pits of Hell's Kitchen? Not a chance. Just a few weeks back (hell, just as recently as the beginning of last night's episode), Keith seemed like a shoo-in to make it to the final round and have a chance of becoming the executive chef at a restaurant at the "billion dollar" Red Rocks Resort in Las Vegas. I always find it amusing, first of all, that the show makes a distinction that the winner of this culinary competition will win the title of executive chef (rather than head chef) because Gordon Ramsay has always been rather upfront about the fact that he finds most executive chefs about as useful to a restaurant as