Yesterday morning at work the preload had a bad day and did not wrap on time. I asked for air help from my ft on car sup, he said I could deliver it no problem. I went to my manager and explained that it is 925am and I have 13 air stops and 2 ssi accounts that must be delivered by 1030 and I still have a 20 minute drive to the route. He said that I was right and he would make sure my sup would get me help. Well guess what, it was too hard for my sup to find help, it meant that he would accutally require him working for his paycheck. I had 9 late air packages. I had a total of 47 stops for 571 pieces, all boxex not many letters involved. I delivered airs until 11am and had to start delivering the grounds. I was way behind and could not finish my deliveries and take a lunch, so I decided I would work through alot of my lunch to make service to the customers this 1 time. The sup shows up close to 2pm and I still have 8 stops for 30 pieces including 6 nda savers. He has a raised tone in his voice and told me I F****** him on purpose. He told me I was done at my 1st stop at 945, I tried explaining that i started scanning 87 packages which 35 of them were international express asd's and I had to enter the 6 digit shipper number for each one. He wanted nothing to do with having a discussion, it was his way and that it. He procedded to tell me he was going to F*** me and take away my gravy work and screw me every chance he gets. I told him that after I was finished with this delivery that I was taking my full hour lunch and 10 minute break and he would have to cover my deliveries or pickups, because i start pick ups at 215ish. He walked away from me laughing. I took my lunch and notified my manager what just happened, he pleaded with me to finish my deliveries and than take my lunch, which I did for my manager In driving with this driver the sup told him I was a J** off for taking my lunch and I would get what I had coming. This morning the sup asked my preloader to go to the other end of the dock, and he approached me with his voice raised and called me a F****** liar and threw his shoulder into me. Others in the area heard him and had turned around just in time to see him assault me. I repeated 3 times to get away from me and each time I raised my voice for others to hear me incase i had to defend my self. After the third request i walked away from the situtation so I would not be put in a violent position. The sup continued to laugh at me and told me to drive the truck. I explained to my manager that i was assaulted and to stressed out to operate the truck safely. I asked for the police to be called and the dm to come to the center. I was then taken to the clinic for a fitness for duty test. And UPS's doctor agreed that I was not safe to drive today because my pulse and blood pressure were high. I was driven back to UPS and dropped off at my truck and told to go home and come back after my vacation which starts tomorrow. My manager said he would address this situtation, should I take his word or should I go to the police department and file assault charges on this sup. If the shoe was on the other foot, we all know I would have been walked out in handcuffs! Sorry its long I wanted to get all the details in the first time. This sup should be fired!