Unfortunately I have had to draw my weapon to defend myself, twice. Strangely both were with in a few months of each other in 2009. And they were vastly differing situation. Both instances I was microseconds from completing the pull of the trigger when the bad guy ran and I was happily not required to actually fire.
Results were: one crackhead gang member who tried to car jack me at the Sam's club gas station on Getwell road in Memphis arrested and eventually sentenced to 3 years in jail (for other outstanding warrants, not for the attempted car jacking of me) and the 2nd bad guy stopped beating the hell out of my friend and ran from the scene. he was caught down the street and arrested for assault. He got a year in jail and 3 years probation. With time served waiting for the trial, he was out in 4 months and is still on probation I think until some time in early 2013.