How to detect bend in a spline or strait part of spline at position

[SAMYTHEBIGJUICY]

Will try, thank You!

Hey guys, just to add to this discussion I tried something like the below to get a variable for the lean angle to use at that point but I suppose there must be a better way if anyone has any ideas as I'm not sure the tf amount I'm using will always represent the same distance. 

                Vector3 Cornernow = Spline.GetTangent(mTF);
                Vector3 Cornercomingup = Spline.GetTangent(mTF + 0.01f);

                Debug.Log("lean angle " + (Cornernow.x-Cornercomingup.x));