an observation of hours

I have noticed, that when working 2nd shift there is a certain pattern to which the hours adhere.
You clock in at 3, and from then to 4 is over before you know it.
The hour between 4 and 5 goes fairly quickly. If its slow, your in for a long night.
Between 5 and 6 is a How's the night Hour, going mostly steady, but slow on a busy night.
6 to 7 is the second slowest hour of the shift, dragging on at a rate of five min per min.
7 to 8 picks up a bit more, plodding steadily
8 to 9 can go either way, but usually is slow.
9 to 10 is the slowest of all, sometimes I'm sure the clock actually stops, and this is a good time for work load to pick up.
10 to 11 flies by normally, mostly because of all the extra work that you picked up in the last hour. This ensures that you will have to stay over 11 to finish you work.
However, bar none, the absolute slowest time of the shift, is the 23 min after 11, the shift layover. the extra work that takes forever to finish, will have only taken up at most 11 min of your time, then you and the rest of your shift, will sit around and stare at each other for another half hour, before the clock flashes 11:23, the magic time you can clock out.