Bounce Demo

May be you should rename it to Irregular shape collision demo. I remember when I was searching for a demo to see how perfect collision works and now here it is

"Irregular Shape Collision Demo" is a bit long and could be misleading, here. However, the documentation does show what is needed to bounce off any smooth surface (curved or not). Complications do occur at bounce points that do not have a normal to the surface and finding the bounce point itself (to find the correct normal to use) could be tricky with irregular surfaces