The discovery was made on 28 August, by one of the members of the expedition - a man who has requested to be referred to only as John.
He had stopped to take a photo of flowers in the canopy, Mr Collins told the BBC.
"John stopped to take a photo of the canopy, and saw something that didn't seem quite right through his viewfinder. He watched it for a little bit longer and the wind blew, and caught it, sending it spinning, and it seemed to be a body."
It hasn't been recovered yet, but the corporeal nature of the thing seems pretty well confirmed. I imagine it could still be up there if the supporting straps and what-not are nylon. Should be interesting.