In the middle of a compilation of celebrity radio commercials of the 1950s and 1960s, this: http://open.spotify.com/track/1uN4TN4JC1kYN3OQNdZrTO

It's Dean Martin and Jerry Lewis recording the trail for a film of theirs called The Caddy. Only, two things: they seem to be improvising most of it so often screw things up; and when they screw up, they start swearing magnificently.