while I was setting the white flags for the dog controller, I had it in my hand and holding up to my ear listening for the buzzer to set the flags at the right distance. I was not paying attention to where I was stepping and i walked into the shock zone with that collar in my hand and it lit me up. I can see where a dog will stay in his boundary. Instead of just throwing it down, I turned and ran back to the white flags. The learning curve for me was short and sweet!!!!