How to deal with a mentally ill shipper? What would you do?

I was getting unloaded at a USPS facility a few days ago and the guy with the pallet jack (not fork lift) was going into my truck as they usually do while I was talking to one of the other guys to get my papers signed. I wasnt in the way at all and he randomly stopped and began staring at me and repeating over and over "I didnt see you there" then he paused in silence staring at me with a blank look on his face then said it again and stared at me with a blank look on his face again. He had a look on his face like he had just seen a murder. He was alot bigger than me so I think he was trying to intimidate me while looking at me like im crazy. I didnt do anything wrong at all. What would you have done if someone acted like that in front of you trying to bully/intimidate you. I used to do otr so I know shippers can be the most miserable and mean people on earth but this was just odd.

Why are shippers so miserable? Is it becasue bullying a driver is the only chance in their sad life to have authority over someone who I assume they know makes 5x as much as they do, or do they hate their life and job so much they have to make everyone else miserable?

What would you have said?

 

I regret not talking back but I didnt know if they would report me or something and the guy was twice my size.

 

I thought those federal gov workers cant get fired after working there for a certain amount of time, man I wish I said something to him but Ill see him again so Ill stand up for myself next time. Youre right, It caught me off guard because it wasnt a normal angry "GO TO DOCK 10 IDIOT..."
he just said something and stared at me for a minute straight, so strange

 

I imagine he was just upset that someone half his age had a career and he just loads trucks for 10$ an hour. Sort of like a fast food manager. Their only chance at life to have authority is to bully another minimum wage worker. When in the real world theyre just bottom of the barrel

 

HAHAHA! thats genius! Funny thing is I think he wanted to impress the girl that I was talking to. So he had to act like a tough guy. That wouldve embarrassed the hell out of him

 

He wasnt a forklift driver, he was using on electric powerjack, and pushing carts, it could be the awful work environment too, or maybe just a miserable person with problems back at home