A giant amoeba oozes up a tree to release spores, and a slug takes a slimy meal. Although it's not as weird as its drippy lunch, the mollusk is pretty odd. It's a native species, Phrophysaon andersoni, with two distinctive talents: it can shed its tail when attacked and it gushes orangish yellow slime when disturbed.
It's not possible to identify the slime mold until it sets up its spore releasing structures. Fred Rhoades kindly identified the moss as Ulota or a small Orthotrichum.
Here's another look at the slime mold.