So after watching this:

https://www.youtube.com/watch?v=XWiY-aN4HKQ&t

i was just thinking about how much science there is contained in tactical training. Things that come to mind are biomenchanics, perception, human behaviour and professional weapons manipulation which in themselfes are complex topics but these guys have to get a lot of things right simultanously.

There obviously is much more to it than i initially thought.