We'd go for an hour long walk/run at the park every morning, and I swear that he was wearing a hidden watch somewhere because he'd always insist on that full hour.
It didn't matter if it was a raging blizzard or pouring rain, we were going. In the very hot summer months I'd have to get up by 5 a.m. at the latest so we could beat the heat.
There was one time when we went on one of those super early walks and there were two loose dogs in the park with no humans around. They came running at us, perhaps to play, or perhaps to kill us. I'll never know. Whatever the case, my Murphy was not the playing type when it came to almost all other dogs, so I knew there was going to be a fight. I said, "Run, Murphy, run!!!" and we ran to my van and got there just in time. I still can't believe he actually listened, but I guess the fun of playing the "run game" was more attractive than the fun of attacking two dogs.
I also can't believe that I could run so fast back then.
And then the kicker was, he KNEW we hadn't been out for the full hour, so we had to go back later and finish the walk.