Why wouldn't I be at least a little on edge if I see just some random person with a gun? Let's say they have it cancealed under a jacket and I catch a glimpse of it?
I have absolutely no clue if this person is trained, carrying it legally, a good guy or bad guy....etc.
I was once in a our local bar and a local police officer was in there (off duty). I noticed that under his shirt, he had a gun. Here he's a police officer and it made me a little uneasy seeing him sit there drinking a beer with a gun under his shirt.