A sucking chest would is natures way of telling you that you've been ambushed
A nice little collection of Vietnam era zippo lighters, personally engraved by their owners:
http://www.huhmagazine.co.uk/4146/zippo-lighters-from-the-vietnam-war
EDIT: I now realise I forgot the "h" in ambushed. Ah well...
A nice little collection of Vietnam era zippo lighters, personally engraved by their owners:

http://www.huhmagazine.co.uk/4146/zippo-lighters-from-the-vietnam-war
EDIT: I now realise I forgot the "h" in ambushed. Ah well...