This figure is incorrect. Since we 

~~~
$ hg push
pushing to https://bitbucket.org/vlad/planets
~~~

it should be

~~~
+--------------------+--------------------+--------------------+
| /home/vlad/planets | /tmp/planets       | /somewhere/planets |
+--------------------+--------------------+--------------------+
                                 |                    |
                                 +-------->-----------+

~~~