Recently I too had a similar experience while loading top soil. It started to rain and no one was in the parking lot except me at the Home Depot. Suddenly this man came up behind me I could see he had driven up but by my turning back and forth to load the 20 bags I should have seen him drive up I did not. He asked if he could help, he was loading 2 bags at a time, I picked up the last bag turned to thank him and there wasn't even a car there. I stood there in the rain wondering if I had just imagined it. Got in the car and thanked the Universe for sending someone to help me.