In a lot of thriller and fantasy stories, blocked passages play a critical role.

            Imagine running from a horrid monster, around corners, up and down stairs, to come to a doorway at the end. The protagonist turns the handle, but it doesn’t move. There’s no keyhole or latch or button to push.

            The blockage could also be a mental one. Imagine studying for an important exam, say the SAT which gives admission to the college of your choice. You’ve gone over sample test questions and even taken a test-prep course. The day arrives. You open the test booklet. Your mind goes blank. It’s like standing in front of a locked door.

            Your task is to write a story in which a blocked passage plays a major role.

            Have fun with this one.