I’m sure you already know this, but next time you answer your door, do it w/ gun in hand......with a bellowing WTF do you want?
Also, I would contact my neighbors and tell them what happened.
He should have never opened the door completely to talk to a stranger. He could have been rushed, robbed, or worse. It was most likely a test run to see if anyone was home, before a break-in ensued. Many people go to work early. Letting the neighbors know what is going on and putting in a call to the police are prudent things to do.
LOL, I should’ve.