I'm one of those people who looks at everyone, if its at night and its just two people rather close to me as soon as I walk out a door I immediately watch their movements, check hands, and try to create distance. I dont know you, I dont know what you want, I assume the worst and prepare for the worst.
But I agree, especially after being stabbed, it will be a lot tougher accessing a firearm, especially a concealed one, from laying on your back while trying to fight off an attacker. Those advanced firearm defense classes look real handy right about now.