I had a Border Collie and also an Australian Shepherd. Both are extremely intelligent dogs.
With my Border Collie, I was trying to show this 12 year old girl how smart the dog was. I told her the dog would measure you up to see how far you could try a tennis ball, and then she would just move the distance to where she thought you could catch the ball. So, I picked up a tennis ball, and she only went about 8 feet away from me. Well, I never did say that I could throw the ball, and that's about how far I could throw. So, then the 12 year old girl picked up the ball and that dog ran back about 80 feet. The girl was a pitcher on a soft ball team. She caught that ball also.
The Aussie, well she loved to help me shovel snow. Every time I would bend over to shovel, she would head butt me in the butt, and knock me over into the snow.
Dogs are wonderful, and a great source of amusement.
amy