Go to the near beginning of the movie where Melvin,(Jack), is on his way to the restaurant.

He is being careful to walk between the cracks on the sidewalk, but watch closely in the background.

As he is walking round the corner, there are about 20 New Yorkers just standing in the background trying to get a glimpse of the great man 'doing his thing'. This is ridiculous! When filming in New York, the city are pretty cool about a movie being made. These guys MUST be tourists!! But the camera crew really should've noticed this and cleared them out the way!