This video is a prime example of how little time we could have when faced with a deadly threat. While the victims in this video were not armed, just pretend that they were.
Luckily for everyone, police were literally just outside when this was going down, and were able to quickly respond to this stabbing spree.
When you practice and train, do you know how quickly you can draw and have your firearm on target? If you carry a gun, you should have a fairly good idea of how quickly you can accomplish this.