I went away for 4 days and had my neighbors watch my dog. They have two jack russels. When i brought him back home he was jumping on and off things constantly!!!!! I think he learned it from them... I was just in the living room watching TV and Louie was playing with a bottle cap (weirdo) and he was going crazy. My mom was sleeping on the couch and i hear her say, "carrie, can you take care of your dog?" i looked over and he was just standing on her looking at her face. hahaha. he's so silly.