What can math educators learn from the audience responses to popular mathematics, such as blogs or YouTube shows? Within classrooms, we use student questions and mistakes to guide our understanding of student thinking and, ultimately, shape our teaching. Similarly, audience response—in the form of comments and emails—gives valuable insight into popular conceptions of mathematics. In this interactive talk, we’ll analyze some particularly interesting responses in hopes of understanding (1) how the broader public perceives math, and (2) how we can better communicate mathematical ideas. Hopefully, these lessons apply to both public engagement and classroom teaching. There will also be time for general questions about public engagement in mathematics.