Edit
I just noticed a news flash that one of the Mi-17 helicopters crashed on take off
due to too many people climbed on board. Very sad.
I found the video I was referring to above.
This also shows the level of "discipline/control like on the ground?"
The kid holding onto the gun as the Helicopter takes off and
is pulled inside when they are airborne is at 1.35 onwards.
https://www.youtube.com/watch?v=pMgPaAUxwvU