Oh muppeteer, poor Toby. That kind of treatment is totally uneccessary, and isn't training at all, just instillment of fear. You need to complain to his regulating body; if he doesn't have one (in fact, even if he does) write to the paper, inform your local vets so they don't recommend him, and spread the word among dog owners too. He shouldn't be allowed anywhere near dogs!
Your pup is a good boy to be looking at you while he is walking, that is just what should be happening. It shows he looks up to you in the metaphorical sense too.
Please don't let this lie, 'trainers' like this man need eradicating...they rely on people who don't have a lot of experience, as they are least likely to challenge their methods.
Take it easy with Toby, as has been suggested, and make sure good things happen on walks (lots of fuss, praise and treats!)
Give him a cuddle from me x