The Tyranny of Numbers

I've been doing quite a bit of training at the gym - sometimes more than I want to. I'm not sure what it is about the human mind and whole numbers or complete things, but I just don't seem to be able to step off a machine after 14 mins and 30 secs - I have to complete that minute! Or if I've done 0.8 Km, I have to finish that K! But sometimes, I'm at the end of 2k, but my time is 14 mins and 30 secs, so I stay on, and then I get into the next K, and I can't stop until that's a whole number, or at least a round 0.5. I can't get off at 2.34Km, that would be madness.
And now, to add to the complication, I have an MP3 player to listen to. But this means I can't stop mid track - I have to wait until the end of the track.
So like some demented soothsayer of old, I keep going until all the elements line up in conjunction - the end of a track falls at the precise point, exactly X minutes after I've started, and when I've completed exactly Y Kilometers.
When that eventually happens, I'll get off the rowing machine or treadmill - but it could be some time, so don't wait for me!
take care