Oh man did I screw that up. You are right of course, just kind of skipped over the “elastic” part and completely messed up the billiards example. Thanks for th

Oh man did I screw that up. You are right of course, just kind of skipped over the “elastic” part and completely messed up the billiards example. Thanks for the correction. (Also, how does a “throwaway” account get that much karma??)