As a C130 Hercules instructor many years ago, one of the duties was to teach in the simulator. The simulator would sometimes a mind of its own and throw the crew (and especially the instructor on a “bar stool”) around in a somewhat disconcerting manner. It was vital for instructors to be able to locate and thump a big coloured “kill everything” button, even in the dark.
I can’t really understand the Airbus system of needing two buttons is not simplified to one DAMN GREAT BIG BUTTON.