Puppies go through a fear phase around 8-11 weeks. If they get spooked, they can over react to other things later on.
Once he's through his shots, just start taking things slowly when you go to introduce him to the outside. His reaction to Turbo was right on. After all, Turbo was in Kush's yard, without Kush's permission
Same thing with the jogger. He's claiming his territory.