There is more to colliding blocks that generate PI [video]

Follow up to following videos:

1) https://www.youtube.com/watch?v=HEfHFsfGXjs&pp=ygULcGkgLyA0I...

2) https://www.youtube.com/watch?v=brU5yLm9DZM&pp=ygUPY29sbGlza...