How I heard an angel’s voice?

One morning I went to the self-service market in Fusing. I parked the car in a different place than usual. I was in a hurry so I quickly, on instinct, went after shopping to the place where I usually park my car. At once quite a loud voice said to me, “the car is parked on the other side”. Naturally, I did not react to this because I thought they were the voice of other people. After that I again heard the same voice that became more louder till I did not turn around and saw who was screaming this. When I turned around to my great surprise there was no one behind me. After this it hit me that this was certainly the voice of an angel and that I had parked my car somewhere else.