No Hands run?

My Sister took Izzy (her puppy)and I for a run, which is awesome, and she had this strange bungie leash thingie tied to her waist, no hands….Whenever I slowed or stopped to sniff, BOING, I snapped back to her hip, wow! I did not expect that. Usually, I pull and get my way, but this was weird…Little Izzy seemed to know what to do and I eventually, I even gave up pulling (and sniffing) and you know what, it was fun! Just to run! The wind in my ears, picking up speed, BOING..maybe too much speed! I slowed down and looked over at my niece (?) and my Sis, and thought….I could get used to this. Thanks Sis!