Working as an assistant manager in a Salt Lake area retail store, it was common for me to be working as late as 2:00 a.m., often alone. It had become a usual experience to see movement out of the corner of my eye as I completed the nightly paperwork, or find something moved from its regular place,  yet it became easy to pass off as fatigue.
    On one particular instance, I was working through the night putting up freight that had been delivered earlier that day. Normally this was a job done by several employees and completed in only a few hours.  However, due to a shortage of available help, I found myself alone.  The building had been used for various businesses after originally being a grocery store. Although the company that I worked for had brought in plastic shopping carts, a few of the metal shopping carts from the grocery store still remained. We used them for bringing freight out from the back room, as I was doing now.
    Being one of only two in management at the time, the manager and I had to split our days as thin as possible. Despite the fact that he needed to be in around 6:00 a.m. to open by 7:00, he agreed to come in after midnight to help with the freight. At midnight I