We can assume I was in a metro train. Right from the start I felt suspicious. For one thing, because of the other passengers in the train. They already were a dead giveaway about what was going on. For one, all of us looked the same: indistinct, underweight, sexless creatures were we, hardly more than arms and legs – two of both – each sitting in elementary chairs and looking in the same forward direction.
Also, we started at station A. Too bloody obvious. Certainly, after a certain “x” amount of time, we would pass station B. I leave it as an exercise for the reader to deduce at what time we would arrive at station C.
But what really made me understood all (where I was, who I was and why) was when I saw the ping-pong table in our wagon. It could not have been more obvious. Two passengers, as sketchy and sexless as the rest of us started to play and since the train remained its constant velocity – not slowing down, not speeding up -, the game proceeded as it would have if the train had been at rest.
Next, I noticed huge clocks next to our heads indicating the local times. The train moved at high-speed and when I looked out of the window, I saw one long platform moving past. On the platform, on equidistant intervals (or so it seemed), identical looking characterless figures stood observing us, and all of them were looking at enormous stopwatches they carried with them.
Yes, then I understood and I was filled with sadness because I knew I was going to die soon.
We were all going to die, as soon as we would arrive at station C and the problem of our arrival time would have been correctly calculated while taking into account all kinematic laws (first Newton, then Einstein). And then, with a final flourish and a flourishing finale, the teacher in front of the class would erase the blackboard and us (the train, the passengers, the ping-pong table and me) out of existence.