Reference:
hey have one special breed specific trait which is referred to as the "zoom". They tend to do it if there is some excitement going on OR if they feel you are feeling a bit down. They will catch your eye, drop down on their elbows with their tail in the air and then take off galloping around the room, finishing up in the same position as they started, with a big, wide grin on their face. You can't help but laugh when they do it.
I'm smiling just trying to imagine it 
