Here in Texas that is called brandishing and is a no no. I would have to see more written about this incident before I would think that there is any way he could have thought himself in danger so as to need to pull his firearm. She may have ticked him off but if I pulled my gun on everyone that ticked me off I might as well walk around with it in my hand. Restraint, common sense, good judgement are all phrases that come to mind. From what I have read so far he seems to have exercised none of them.
By faith Noah,being warned of God of things not seen as yet, moved with fear,prepared an ark to the saving of his house;by the which he condemned the world,and became heir of the righteousness which is by faith Heb.11:7