I totally agree with Anthony and support his view point!
I believe what Anthony is referring to is called 'flooding'. Flooding the autonomic nervous system, which is where the sympathetic nervous system is located (fight/flight) in a safe environment to educate the parasympathetic nrevous system, which( promotes calming of the nerves return to regular function, and enhances digestion), to return to normal functioning. In order for our bodies to go back into having a normal response in a non threatening situation

I have used a post I posted from a thread, to show my example:

Learning
I went to the cinema a couple of weeks ago and watched 'Cloverfield' OMG!!! Not the best film for someone with my disposition but I watched it from the start to the finish even though every neuron in my body was yelling at me to get the hell out of there - that is when I had an epiphany - my anxiety is triggered by random stimulus which has made it so difficult to understand why and what the hell was actually triggering it!
The fear that I experienced whilst watching the film due to the loud noises, screaming etc, induced so much fear - which is the premise of most scary films - was the trigger - the FEAR OF FEAR itself - my body reacts as if there is an immediate danger that I need to fight or flight from so to sit through it and show my internal workings that I have survived, is something I feel is important! WOW! - I felt elated by that experience even though my legs had turned to jelly and my breathing was all over the place etc etc.