Continuity mistake: When Robert gets up in the morning to deal with the pest problem he has facial stubble, but when he gets outside after chasing Nancy in his pyjamas, he is nearly clean shaven. When he goes back to the apartment his heavy stubble is back again.
Continuity mistake: The first time we see Robert with the arguing couple, the woman puts her finger to the side of her head in a side-on shot of her, and in the next (a more front-on shot) her hand is suddenly on the table.
Continuity mistake: In the scene where they are in the pizza shop, Robert's part in his hair changes back and forth noticeably between shots.
Continuity mistake: During Giselle's first night in New York, from the time she crawls out of a sewer, the bottom of her white gown (and white stockings) becomes somewhat dirty, but by the time she falls asleep on the couch in the apartment, the gown is cleaner.
Continuity mistake: At Bella Notte's, there is a pizza pie on table, whose characteristics such as sauce, crust, dough bubbles, three basil leaves, etc., change from the start of this scene to when it is hurled like a frisbee.
Continuity mistake: When Giselle stands on the livingroom coffee table as she sings, the hutch stands about a foot away from the fireplace mantle behind her. When she tosses the flowers into the vase, which sits upon the fireplace mantle, the hutch is so close that it nearly touches the mantle.
Continuity mistake: When Robert and Giselle are at Bella Notte's, there is a red checkered tablecloth on the table. The direction of the broad red lines changes between shots, in Chip's close-up when he stands on Gabrielle's plate. First it's horizontal, then vertical - note the knife and fork.
Continuity mistake: At Bella Notte's, after Robert entertains Giselle with the magic trick, the salt shaker is on the table between them and the pepper shaker is at the opposite end of the table, beside Morgan's plate. When Nathaniel brings the apple martini both shakers are beside Morgan's plate, though nobody touched the salt.
Continuity mistake: Look at Giselle's right arm when she falls on Robert after stepping out of the shower. In the initial shot, that arm is on the floor. In the next, she's using that arm to hold her towel in place.
Continuity mistake: When Giselle is cleaning her apartment up, flies come down her fireplace in an open flue. Exterior shots of the apartment show no chimney.
Continuity mistake: When Nathaniel leaves the hotel room after he hangs Pip in the closet, there is a window shot of him crossing the street and heading to a snow covered sidewalk the next day. But when Pip frees himself and runs outside, there is no snow.
Continuity mistake: When Edward stabs the bus, the length of his sword is inconsistent. For it to reach all the way down as far as it did (as seen from inside the bus), it would have to be much longer than it is throughout the rest of the movie.
Answer: If Elsa died from magic, her son, the prince, would know and turn against her. If she died by somebody else or a tragic accident, the Queen's hands would be clean.