Catastrophe theory is a sudden drop off in arousal where the sudden drop equates to a decrease in performance. However before it drops it has to reach a peak and as that peak slowly rises, so does arousal and performance. The peak is the highest arousal and best performance. The drop is straight after and is when there is over arousal which leads to a decrease in performance. However, if the performer does drop, they can get back up to prior levels if they manage to successfully compose themselves - otherwise they will fall further