Hello ...I was employed at UPS back in the late 80's early 90's . One day stepping out of my pkg car I hung my shirt sleeve on the door latch and torr my shoulder roataiter . Any way long story short I had surgery and about a year later I was accused of flipping the finger at the center mgr's wife and that was the beginning of the end for me. A few years later things started getting strange feelings in my neck and shoulder like little tremors but didn't think much about it and through the years lived with it . For the past 8 or so years things have been hell , I'll spare the details but I had X-rays taken of my shoulder and it seems the screw in my arm is moor than just a screw. I think the company was testing the idea of tracking devices in employes even back then . I'm looking for anyone els who may have had a similar experience .