a rarely opportunity to get together

Last month, one of my best friends just came back from Mainland China. My best three friends and I decided to hold this chance to spend time together. We have been talked for many hours and took a lot of pictures. At the last moment before we left, we went outside to ask an old foreigner lady who was just about to get into the restaurant. And after she took picture for us, she just took over and didn't get inside. Suddenly, many questions were pump up from our heads why she didn't get into the restaurant eventually. Then, four of us got a conclusion was that she must be interrupted by us. That's why she forgot her oringnal plan.