Insect and Spider Identification: CLOSED: Beautiful large green & pink caterpillar with horn tail?, 0 by slywlf

slywlf wrote:
This beauty must have been dislodged from it's hideaway while I was doing Fall cleanup today, as I suddenly noticed something pastel green and pink thrashing vigorously among the leaf litter, still firmly clasping the remains of the stem it had been holding onto. It hangs quietly when left alone, but thrashes at the slightest disturbance.

It seems to be without any bristles, the pink and green are mottled rather than distinct spots, and the body pattern is 'slashed' rather than banded (I did TRY to research this myself before I came here!)

I found a twist-tie and re-attached the stem in a sheltered shrub near where I found it, since I have no idea exactly where it had been before I dislodged it.

Neither my camera nor my basic photography skills have been up to the task of getting a really good clear picture, but here is what I was able to get.
I am in the Central Catskills of NY zone 5 - can anyone clue me as to the identity of this pastel beauty?