Is it possible to park a train?

After yesterday’s journey I think it is quite possible to park a train in the middle of nowhere. Well, when I went to sleep last night around 10 pm, we were running on time. In fact, the train was ahead of schedule in a few stations. And then, when I wake up, we reach a station around 5:30 – according to schedule we should have been there around 2am!! So, instead of the scheduled four and a half hours to cover that distance, we took about eight hours…..so, what could have happened??? I can’t think of any other reason…
End result, instead of reaching Secunderabad at 5:15am we reach at 9am!!!