My aussie mix, Graham does this dance we call the "butt up dance" when he's excited, where he lays his front end (front legs and head) down on the ground, while his back end is up in the air and he turns cicrles. I don't know where he picked it up but he knows he looks cute and funny because he still does it after all these years. My pug smashes her face into everything when she's excited. She'll smash her face into your legs if you bend down to pet her, or if you don't bend down, she'll smash her face into the carpet or into her toys. I try to curb the smashing that she does, because she smashes her face into strangers and people don't understand why she's smashing her face into them. It is comical though.