I've seen dozens of videos of people doing this and it never ends well for them.

Posted by Guest on Mon Aug 24 15:36:37 2015

this is not a yoga ball, this is an exercise ball. americans might mix exercise balls with yoga but that doesn't make it yoga.

Posted by Guest on Tue Aug 25 03:39:53 2015

Today we learn about conservation of momentum in elastic collisions...

Posted by Guest on Tue Sep 1 02:09:21 2015