Thanks for standing up to the jerk. He really should not be allowed to "train" his dog like that.
Sadly, in the late 80's, that method of training was being taught and classes - along with use of a pinch collar. The instructor said to "Plant your feet, let your dog get to the end of the leash and pull back as hard as you can". Ugh.
I saw dogs literally fly through the air they were jerked so hard.
The instructor called me a "pansy" when I couldn't do that to my much-loved, unruly, stubborn-as a-stump Dalmatian, so I found another instructor.
Again, thank you for letting him know this is not acceptable.
(this was posted by jHalf, btw. I doubt the above-mentioned instructor would have had the cajones to call gHalf a pansy)