Gregory Whitehead: Pressures of the Unspeakable

If you have the forty minutes or so to spare this is an absolutely fascinating radio project on the scream:

http://gregorywhitehead.files.wordpress.com/2012/10/potu.m4a

Here is the script: http://gregorywhitehead.files.wordpress.com/2012/10/potuscript.pdf
You can read more about Gregory Whitehead here:

http://gregorywhitehead.net/gw/bio/