We messed up.

My friend and I have taken to playing I spy when we walk across our college campus because it passes the time. We usually joke around like "I spy something white" "is it you? damn girl, you need a tan." And stuff like that. Well she had said I spy something red and I said "is it that takeout box?" (The takeout box was in someone's car) she said "no but clean your f***ing car!" (The car was super messy and covered in garbage). I laughed and said "it is messy as hell." Then we hear "Thanks. I know it is. But hey I'm planning my wedding and that's stressful as hell. So yeah, my car is full of wedding crap and my lunch from today. Thanks guys." We turned and immediately started trying to apologize to the girl and that we didn't know and were joking with each other and she just walked away from us. We went to my friends car and went and parked somewhere else. I feel awful..I thought it was just trash, I didn't notice it was wedding planning stuff..