Me too. Our 11 month old chessie was recently "tied out" on a chain to dry off after having her turn at training day. Ground was too hard to drive in the stake, so I hooked her onto the trailer hitch of the truck. Next thing I know, she's jumped up into the truck right over the tailgate, flatfooted. She tends to jump up to eye level in the heel position just because she's excited. She jumps up to eye level when told to heel when sitting in front of me. And she never enters the water without a jump.
Be carefull with that. Seen one tied to trailer hitch and it jumped in back of truck and then tried to jump out over side of bed. He Bit tongue in half.
I think rope got tangeled up and almost hung himself