I have started walking every morning for twenty or thirty minutes. So yesterday I had to work and almost didn't go, but decided to get in a quick ten minute walk. I don't usually take my phone, but decided to take it, and I was so glad I did because a block from my house I came upon an older Chinese man face down on the sidewalk and bleeding profusely from his mouth/face. It was kind of unreal, at first I thought it might be a Halloween decoration, our neighborhood goes all out for decorations, but it was real.
He was quite dazed, and didn't speak English, but he nodded when I asked if he wanted me to call 911. While we were waiting for the paramedics he was able to tell me a phone number and I held the phone so he could talk to his family. They got there shortly after the paramedics and so could translate. Apparently he tripped and fell, hurting his hands and face. They thought he was going to be OK, but advised him to go to the hospital.
I will never go on a walk without my phone again, you just never know what could happen, next time it could be me on the ground.