Read the following context and answer the question.
Context: We were out the door according to schedule and even the Sunday drivers could n't keep us from getting to the cinema on time . We bought our tickets , purchased some snacks , and went in to get seats . When we opened the door to Theatre 2 , the unmistakable smell of urine slapped us in the face .
Question: How can urine " slap " ?
Answer:


The smell makes you gasp / gag .