Don't Chase your Dog Mr.

I was recently working with a student and his ten month old Springer Spaniel. We were practicing long stays near a large lake where we had a new environment and a few distractions but this dog is well past the basics so it was a good opportunity to work on long stays off leash.
We had done a couple of shorter (1 minute) stays so I upped the ante a bit and asked for 3 minutes with the handler in front of and about ten feet from the dog. At about the 2 minute point there was a distraction near the shoreline and the hunter part of the springer kicked in and he headed for the lake.
At first this was like a casual dog pace until his handler did the panic routine. Next thing I know the handler is running toward the dog shouting NO, DOWN and COME and the faster this man ran the louder and fast and frantic he yelled.
Well needless to say Mr. Springer, realizing he was being pursued by a raving lunatic, did a "u-boat special" and headed for deep water. I walked toward the lake calmly saying "Don't chase your dog sir and don't yell at your dog." As the dog is swimming about 10 feet off  but parallel to shore the man is still acting like a Jack Russel on steroids when he looks up and sees a sea wall jutting out into the lake so there's no more shore  line and Springer looks like he's in training for the big Channel Swim. By now I'm beginning to find this quite entertaining. Mr. Handler is still admonishing his dog except he's now up to his knees and water and it's not getting any shallower. About three more leaps and he realizes he's not going to catch the dog so he turns and wades back to shore and behold the dog looks back and says "Hey, aren't you coming along?" I whistle and the dog heads back full of enthusiasm runs up to me, shakes water all over and sits down and waits for his master to get the water out of his $130 runners and designer shorts.
The lesson is DON'T CHASE YOUR DOG and especially cool it with the yelling routine. All the shouting does is make the dog go faster. Remember high pitched , loud, and fast vocalizing means speed up and get out of town. Low and slow mean whoa.