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 .
According to the above context, answer the following question.
How can urine " slap " ?


The smell makes you gasp / gag .