Gas stations are mine fields

I needed gas on the commute this morning so I pulled into the local “pump and munch” to fill up. While looking for an open pump I slowed to let a pedestrian cross. As I did a car began backing out of the pumps directly toward me. I waited as long as I could but had no choice but to tap the airhorn to let him know he was about to hit me. Of course the pedestrian assumed I was honking at him and flipped me off. Another lesson learned.