Looks pretty brutal ... I have a question:

How can it be true that in a facility with so many door flaps, 
"they had not been trained to regain control of open door flaps ... ???"


   I would imagine stuff like this happens more than a few times every month, in every penal institution with door flaps.   There's no established method or procedure for this type of behavior??   Really??

   Probably no less cruel, but the threat of and if necessary the use of a taser would eventually convince even the most stubborn sociopaths to try some other way to make their point.  

    I guess the place is too small to have an official trained correctional emergency response team to simply open the door and crash the cell.