I maybe wayyy off here but I'm thinking it was something to do with caterpillars at Kholo Creek ...if you read my post #93, page 4 this thread...from the link I posted...
There are only two families of lepidoptera within Australia that have caterpillars which possess these stinging hairs; they are the Limacodidae ("cup moths" or "Chinese junk" caterpillars) and the Nolidae (gumleaf skeletonisers).
These hairs are fragile and easily dislodged from the caterpillar, they adhere to the surface of skin when the caterpiller is contacted, or they become airborne and on settling
the barbed or dart hairs easily fragment and penetrate clothing or skin. Hairs that are air-borne can drift and settle on nearby washing or other surfaces which humans will contact
http://medent.usyd.edu.au/fact/caterpillars.htm
UWA Centre for Forensic Science in Perth also does services for Forensic testing which includes
Entomology
http://www.forensicscience.uwa.edu.au/services
ps... I hope GBC's dreams are visited nightly by a 1,000 caterpillars.