Continuity: When Jack and Helen Hunt enter the restaurant on their trip, a certain song is playing. (I can't recall what song). Jack leaves to buy a jacket, returns, and just after they are seated, you hear the female band leader say, "Here's a special song for (blah blah blah)..." And it's the same song they played 10 minutes ago. (Time)

Revealing: At the beginning of the movie, when Jack Nicholson catches Simon's dog, he holds it away from him, with his arms stretched.  When the dog begins to pee, you can see that the urine is coming out from Jack Nicholson's glove. (Time)

Visible crew/equipment: Early in the movie, Jack Nicholson walks for the first time to the restaurant in which Helen Hunt works. As Jack turns the corner on the sidewalk and walks towards the camera, he is surrounded by extras playing people he must dodge. If you look in the center and right background, you will see New York spectators standing in the middle of the street, watching the movie being made. (Time)

Revealing: Midway through the film, Helen Hunt is on a bus heading to Jack Nicholson's apartment in Manhattan. She is going to tell him that she won't sleep with him after he has given her son free medical care. She is in a pensive mood and the camera pulls out showing her in the window. As the camera pulls out further, the readable sign on the side of the bus says "not in service." (Time)