I took C. Robert McDowell's HG101 class out in McKean, PA a few years back. Very emphatic about trigger discipline. To illustrate his point, he showed us a very striking picture he has hung on the wall - a wounded Marine in Iraq, carried out by his buddies after a brutal close quarter fight with insurgents hiding in a house. His sidearm is in one hand, and it's clear beyond any doubt that despite all he's gone through - his trigger finger is exactly where it's supposed to be.