Calvin DeForest died this week at the age of 85. He's best known - in fact, probably only known - as a regular foil of David Letterman's, both at NBC, where he played the character Larry "Bud" Melman, and CBS, where he appeared under his real name.
He had a persona where he wasn't so much clueless as in his own world. It never failed to amuse Letterman when he would talk at the wrong camera, or not know how to work the microphone, or say just about anything in his helpless bray of a voice.
Here he is in 1983, serving as offical greeter at the Port Authority bus terminal, turning a funny idea into something approaching magic.