Not sure what this clip is from (do you know?), but it’s a rare interview with David Letterman, talking about his experiences as a comedian at The Comedy Store. What’s interesting to me is his stage persona, which already seems to be developing into his screen persona.
Listen out after the jacuzzi joke for a Paul Shaffer-esque laugh from the audience.
![David Letterman](http://www.simondunn.me.uk/wp-content/uploads/2013/05/lettermanda.jpg)