You'd have to be special to get that kind of treatment. Guys and gals with knifes get paid a lot of money to do what they do. There's years of schooling involved and numerous certifications (federal and state) required before being allowed to run free. Sometimes you'll a guy in training. You can tell this by his Nerf knife and the instructor with a clipboard following him. Knife people are like doctors but better. They are important.
So, the man with the knife you saw this morning at 4am, he was not chasing you.