Hi.
On the page:
https://wiki.jmonkeyengine.org/legacy/doku.php/jme3:beginner:hello_physics
There is the sentence, about 2/3 down:
“You create a brick Geometry ball_geo” …
I think it should be:
“You create a ball Geometry ball_geo” …
since we are talking about “ball_geo” … 
