I really like the Gymnastics Canada WAG Aspire program for talented young gymnasts.
The Aspire Camps are great too.
You can check out the 2017-2018 ASPIRE PROGRAM MANUAL online for free, if you like.
There is one error on page 15.
Of course the path of the Centre of Gravity starts tangent to the point of release. If you let go of the Bar when the C of G reaches horizontal you’d best be doing a Geinger.
If you release with hips above horizontal as required by that Aspire graphic there’s a very good chance you’ll land on the Bar.
The video linked from page 15 is correct, however.
The gymnast could apply a force to the Bar on release to either pitch-out or pull-in the Centre of Mass. Pulling-in can result in hitting the Bar.
related – G.S. George – Tangent-Release Principle