Norm Macdonald got into a weird, public discussion with Steve Martin today on Twitter, and Macdonald even told Martin via Twitter that he mentioned it to David Letterman.

Norm wasn't kidding. So to speak. He kids a lot. You know that. Here's the evidence, from tonight's Late Show with David Letterman.


Background: This is the first Tweet of Steve Martin's that Norm was reading. And this was the second one that confused him and Dave.