Introduction to Art: Concepts & Techniques is an art appreciation course created for individuals without any artistic background. This course introduces you to various art movements, cultural influences, artistic genres, artists, and their artwork.
It depends on what type of mad reaction you're looking for. you could;
1. Clench your fists and maybe stomp your foot if you're looking for an exaggerated, maybe even comical display of anger
2. turn away slightly and grab your head/hair in a slightly hysterical anger
3. Shake your fist at them
4. Cross your arms over your chest
Or some combination of those things, I hope that gives you some ideas!