First, while I do own guns I do not carry them into a Walmart or any other store. In my house or in my car is okay but even though in Texas I don't need a carry permit I don't carry. That said, if I'm in a Walmart or anywhere else and I hear shooting and screaming then I head for the door unless that's where the shooting is. In which case I hide; if I'm carrying I do not go looking for trouble, I hunker down and wait for the cops to show up. I will draw my carry gun if I'm carrying to defend myself should it become necessary, but frankly I'm not a hero and was not trained to be one. But if the bad guy comes at me then I shoot his ass.