dahs is checking his mail.
Random dude walks up and punches him in the face.
dahs, surprised, starts looking around.
Dude says "Don't look around, it was me, *****."
dahs, for a moment, contemplates striking back. But, after careful deliberations, decides against it. He doesn't feel he can knock the dude out with one punch. The dude knows where he lives. The dude might be lying, there might be more. Even if it is just him this time, there might be more next time. And, even if dahs knocks him out, the dude might have a stronger brother/friend who might come back next time.
dahs silently walks back into his house, mail in hand.
Because, after all, there's really not much you can do if someone randomly punches you in the face. And, if you retaliate, it might be worse next time. Best just to wait and see what happens.