Half-way pulled, but didn't shoot, because my Smith 642 never completely left the pocket holster. I was walking out of a mall, and noticed a group of men who looked to be up to no good hanging around off to one side. I immediately moved to the other side, and began to circle around them as my car was parked down an isle behind where they were standing. One of them called out to me, wanting to know if I wanted to buy a watch. Yeah, right. I acted like I didn't hear him and kept walking, and put my hand in my pocket on the 642's grip. The same guy then started to follow at a brisk pace, saying "hey, I'm talking to you." He had very quickly closed the gap to about 10 yards, so I turned quickly around, continued walking backwards, and pulled the 642 half-way out my pocket. The BG immediately stopped, and began to walk backwards for a few paces, then turned and trotted back to his group. I was almost to my car, hopped in, and left quickly. I'm certainly glad I didn't have to actually pull it all the way out, and certainly glad I didn't have to fire.
I hope that day never comes,and I work at avoiding places/situations where that may be more likely. However, I realize that sometimes no matter how cautious you may be, those situations find you.
I had someone approach me in a different mall, completely different circumstances than the time described above. This guy had run a red light while talking in a cell phone, and then stopped in the middle of an intersection. With traffic behind me beginning to back and blow horns, I had to go around him as did everyone else. He then followed me into the mall parking deck, where he began to threaten me, and eventually threatened to pull a gun. I told him he needed to leave leave and I walked away without having to pull my weapon, and he eventually left. While this was peaceably resolved, it's an example of how this situations can come up when you least expect it.