Oops, confused myself with my own sample before... the start of the sound is played, though only a very short length (gets longer with worse bottoming out, but still only a few tenths of a second).
VS_OUTSIDE_SCRAPING is definitely used for external views, and it sounds like the sample is put through a filter of some sort - low-pass, or simply reduced frequency, or something else. (it gets broken up a bit anyway due to the short sample length, so plenty of clicking as it loops)