Dark Side of The Moon.

[friedaweed]

That was some conversation with a roadie or engineer in the studio wasn't it?

Very likely to be Peter Watts the groups road manager. I'd heared something like that but this is the closest i could find identifying him as doing the 'stoned' laughter in speak to me and brain damage.

Some interesting stuff on the album here.
http://www.pinkfloyd.co.uk/dsotm/content/setup.html