How do I delete all comments from a specific old blog post?

I’m cleaning up an old, controversial blog entry and I need to remove all the comments from the post.

Surprisingly, I can’t find a way to do this within the existing WordPress (3.0.4) UI.

I can certainly go through and click “trash” on all 200+ comments, but that seems.. excessive. Is there another way to do this that I am missing?

Alternative for people reading this with a fear for SQL…………… (or finding this via Google after Januari 2011):

Wait for this action until 3.1 comes out, then go to a post, check all comments and bulk “move to trash” 🙂 (it should come out any day now) (http://wordpress.org/about/roadmap/)

(or download 3.1 RC3 from http://wordpress.org/download/release-archive/)

Example:

http://edward.de.leau.net/files/bulkremove.png