When you didn't know someone was near you

I was outside tonight bringing in a few grocery bags when one of them ripped right in half. Ughh! My quick ninja sills sprung into action and I caught it midd air, half ripped , from falling completely to the ground. I yelled out Bitch!! Lol. I shut my trunk and heard a shuffle behind me. My neighbor was at her car outside, oh God!! I felt so embarrassed!! I said it loud enough for her to hear. Next time I'll try to mutter it 😬😆😩