My 9 mo old pup of course does his. Sometimes inside as we have an open house where he can run around through the kitchen, living room, and foyer. The funniest is outside when he does his circles around the yard. Sometimes he runs behind the chair that is against the house and he uses the chairs to change direction also. One time he had so much momentum he launched off the chair and pushed off my picture window. Luckily no damage! He also comes flying into the house through the doggie door full speed. A few times I had the security gate on it and he crashed into it. Once he even missed the doggie door completely and crashed into the side of the house. I'm amazed he hasn't hurt himself.