Endless Minutes

What is this kind of feeling?
In school, for example,
You don't like the subject.
You always glance on your watch.
You are feeling very rushed.
In short, you want that moment pass.
So, it is also like waiting for the
time for the subject ends, right?
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Why is it like that,your waiting for his/her call.
If he/she said; I'll be calling you later.
Then, you, yourself can't wait.
Then, the (LATER) came, You and Her/Him
talks about anything.. Then you noticed,
that the Clock runs very fast.
As if it is being controlled.
It's like a feeling that, you and her/him
were just talking for a couple of minutes.
But when you glanced on the clock,
it is an hour ago!
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Why is it like that.
If you like the subject.
It seems like time time run so fast, right?
But if you don't like the subject,
you can't wait for the time to end it.