Accident or conspiracy? David Letterman and Craig Ferguson delivered the same (lame) joke on the same night last week. Their late-night talk shows aired back to back on the same network, too. What's even more baffling is the fact that these dudes actually had writers. Did one of their writers leak the joke cuz it's now — (wait for it, wait for it) — the Year of the Rat? Ba-dum ching!