Funny NYC joke! These two guys are walking along the street and one says to the other, 'Do you hear that'?

His friend says 'What?' 'Listen!' he responds and then they both hear 'Nine, nine, nine, nine, nine...' repeated over and over again from the other side of a wooden fence surrounding a construction site on that same street. As they walk further they hear it get louder and angrier.. 'NINE, NINE, NINE, NINE....' driving the first guy nuts! He then asks his friend to give him a boost so he could look over the top of the fence to see who is saying this. His friend boosts him up, he looks over the fence and a fist out of nowhere slams him in the face, sending him to the sidewalk! As he shakes his head, both he and his bubby hear from the other side of the fence......' ten, ten, ten, ten ,ten, ten....!