You never know when a photo will present itself to you. But, I have learned you always have to be ready. I am not quite always ready, since I don't have my camera with me for those happenstance shots.
But I have been on a roll recently, and had my camera with me tonight. I drive up to the yoga studio, and there is David, with the hood of his car up, jumper cables on the asphalt and his partner Jim, opening the hood of his car. Perfect! But I didn't want to interfere in the delicate process, so I didn't go for an action shot, but waited for one after the car was running. I suppose that's what David gets for being so early that he sat and read in the car with the radio on, and the headlights shining