trampling the silent stones and the dry leaves.

Someone behind me also tramples, stones, leaves:
if I slow down, he slows;

if I run, he runs

I turn: nobody.

Everything dark and doorless,

only my steps aware of me,

I turning and turning among these corners

which lead forever to the street

where nobody waits for, nobody follows me,

where I pursue a man who stumbles

and rises and says when he sees me: nobody.

In at least three sentences, answer the following question.
What senses are called upon to make the experience concrete? Provide specific examples (quote) to support your response.

The senses of sight and touch are called upon to make the experience concrete. The poet describes the surroundings as "Everything dark and doorless," providing a visual image of darkness and lack of exit. Additionally, the poet mentions "only my steps aware of me," appealing to the sense of touch to convey the sensation of walking on the stones and leaves.