Not sure is this one is mentioned yet, and I'm sure its a trait of many--when running the Rattie 500 in the yard, a rattie must take a FLYING LEAP from the sidewalk to the grass, which is a height difference of about 1/2 inch. 

Casey here, will finish is ratty 500 by circling one last time in the back yard, entering the house to to his house 1meter dash, and then levitate himself through the air, to the pack of the sofa, prepell off our hudge sofa pillows, and catapolt straight back to the floor. All in one swift motion. Isn't it great entertainment.

And at my house, when they finish that zooming and come inside, we've discovered there must be  an "invisible" trip wire across my back door!  Because every time Zipper trips it, it turns her into a "crazy" dog and she starts immediate and minorly aggressive "playing?" with Button. And folks, this is EVERY SINGLE TIME she comes through that back door!  Sweet Button is so tolerant of what Zipper dishes out!  Button has just learned to tuck butt and run when she comes in now, because she knows Zipper's gonna do it! Button's a fast learner! Sooooo Funny!

And I just thought our dog was strange...we didn't know he was a rattie until recently, and hate to admit it, I didn't even know about the breed until recently. We got our dog from the pound and just thought he was some strange mix of hyper dog. So when we first saw  him take a flying leap from the front porch over the bushes into the yard, we were stunned, he's so tiny, and only weighs 20 lbs, so how did he ever jump that high? It's even more fun to watch after he gets a running start!  He also loves to jump from couch to couch, which are a few feet apart!  hehe