Apology accepted, kind of ;) ...also on behalf of !Xóõ speakers, who are underrepresented on the internet.

Maybe you or your readers might be interested in more information on clicks, bilabial or otherwise.

First of all, here's a page with audio:

http://hctv.humnet.ucla.edu/departments/linguistics/VowelsandConsonants/course/chapter6/xong/!xong.html

And here's one with an explanation:

http://www.campusprogram.com/reference/en/wikipedia/c/cl/click_consonant.html

Best,

Damon