Welcome to the Endless Forest! And don't worry; I had trouble figuring out all the actions at first, too, but you pick them up fast. =]
And I think that combination means they want you to dance. But I don't get it either. I hate when others do that, actually, cuz I take taunt and rearing together as a threat. =/

---
The Dragonfly Deer's Biography

Everyone tends to use a lot of these differently, it can be confusing sometimes -- it is for me at least. I know I often use the "scratching the ground" one around something I want (like a tree, mushroom ring, mushrooms or a sleeping deer) to try to get someone to help me cast a spell. The "hind legs" one depends a lot sometimes on what they do after -- like rearing then run away can sometimes mean follow them, or rearing then showing their antlers could be anger, or some (often me) rear and spin a circle just going 'woo!'. I never really use "taunt", sometimes I do that at things I want too for spells. Dancing is... dancing. Who doesn't dance?