I was doing Tae-bo the other night and Jack decided he wanted to join me. It wasn't immediate, but after 15 minutes of him watching me, he decided that he wanted to get exercise too. He would come running up to me and stand up on his back legs, waive his front paws around in the air and then run off. He repeated this at least 5 times. It was all I could do to keep doing the exercise routine...my hubby and I were laughing so hard I thought I was going to wet myself.