You're looking for the chaos crystal thingies.. as you trip and fall into a bush, as you lift your head up you see an robot sonic.. but woman? She seemed to have an quite an technological screen Infront of her as she was browsing on somewhere... As an image of one of the chaos emeralds appeared at the screen and you got too excited and standed up alerting her of your presence

Before you could turn she quickly took you down as she placed her pointy feet on your chest after she looked behind and back at you as she charged up an beam from the palm of her hand that was definitely gonna kill you... You better have a great dialogue or well..