wowa
Куча таких обучалок существует - ютуб в помощь.
https://www.youtube.com/watch?v=ey37jwXD8Gc
https://www.youtube.com/watch?v=n6EGdKRM7uY
https://www.youtube.com/watch?v=8aWJhGKhAvk
https://www.youtube.com/watch?v=rd7GlmOmhOQ
"...the personal strengths and weaknesses of a leader are no true indication of the merits of his cause"
(с) Roger Zelazny
(с) Roger Zelazny