Given the task definition and input, reply with output. In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.

I knew they would come fighting back and sure enough , that is exactly what they did . They began to whittle away at the large lead Sendai had built and before long , they were only down by 6 going into a timeout . It was at this point that my future wife and her friends came out onto the court waving towels and trying to get the crowd to do so . Shannon , having brought a towel with her , started waving it .
Question: What may have caused Shannon to start waving the towel ?
Other people were doing it .