Thanks for sharing that, Tony. That is most definitely a book I would buy.
Ledyard Sensei, your description echoes the experiences I had bouncing and working in residential treatment facilities. In restraint situations in either case, the blustery folks that made a big production prior to us going hands on were often giving warning signs that enabled us (especially when there were multiple staff present) to essentially 'get ready' and choose our takedown spots.
The 'predators' as you describe, were much scarier in that they didn't always have the same 'tells' or visible points of escalation. They were much more likely to go from zero to full bore in a quicker period.