Here it is with its head curved like an elephant's trunk. Made me wonder if it was an elephant hawk moth caterpillar but am not sure because there were no similar pictures on the net. This one was gooey and slimy and had a small yellow tail and a big head an stumps for legs.
This is another angle and I have tweaked the photo a bit and this picture explains the various fictional aliens that we see in movies! At least their heads. Looks almost unreal.