So I genuinely try not to think about it too much because it literally is mentally daunting. I literally know and have experienced this kind of thousand-yard stare... Oh hey RDJ nice to see you again :)
But also, seriously, when you first learn about the scope of a project like that, the weight of the responsibility hits you and everyone on that project literally went through some kind of mental shock coming to terms with what we were responsible for (the safety of the planet in short)