It is said that when you love to do an activity, one of your favorites, you don’t know how the time passes. Many times with such activities people feel the shortage of time. Yes, it all depends on your mindset and the pleasure you derive from such activities that may make you feel that time is a constraint.
The simple theory here applies about human preference to a particular activity that if one loves it, then one does not prefer to restrict the activity to the pins of the clock as opposed to this are the activities, which are more a compulsion, here time seems to drag.
There are a number of activities where one may feel that time is constricting. A student may feel it when the date of the exam is declared and he has to complete his syllabus. A sculpture may feel it when the artifact is yet to finish, but the date of its display is close. A dancer who just needs to hit the stage may feel it when she has to go on stage to perform and she is struggling with her attire.