I don't think it's intelligence, more like stability or self-control. Or perhaps just focus on the task at hand, mental discipline. It's definitely not about raw IQ, or I would not be able to even pull the trigger.

(Ok, I'm exaggerating here; I think I have enough brains to point the rifle in the right direction. More or less.)

To be honest, sometimes, I think I overthink stuff and that gets me in trouble. I believe that following and calling conditions is more of an art than a science and that may be my issue. I am first and foremost a scientist, definitely not an artist.