I once got cat called in a grocery store. It went normally at first, where I pretended I couldn’t hear him through my headphones and ignored him. However, 20 minutes later, he approached me (while my headphones were off) and repeatedly asked me why I had ignored him. It was so creepy! Was he following me waiting for an opportunity or something? I was so flustered I just said “oh sorry, I couldn’t hear you through my headphones”. I wish now I had the balls to say, “I didn’t want to talk to you”.