Continuity mistake: In the scene where Hud, Jason, and Rob are hiding in the grocery store, you can see several items toppled over on the shelves above Jason's head. When the lights start to flicker, you notice almost all the objects are now standing upright, only to be toppled over again. (00:21:45)
Cloverfield (2008)
Ending / spoiler
Directed by: Matt Reeves
Starring: T.J. Miller, Lizzy Caplan, Jessica Lucas, Michael Stahl-David, Odette Yustman
After saving Beth from her crumbled building, Rob, HUD, Beth and Lily escape the buildings and board evacuation helicopters just as the giant creature attacks nearby. Lily is separated during the evacuation, with her escaping in a different helicopter. Flying above Manhattan as day breaks, Rob, Beth and Hud witness military planes attacking, and seemingly killing, the giant creature; however, the creature leaps out of the smoke plumes and swipes at their helicopter, causing it to crash in Central Park. Hud, Rob and Beth survive the crash, only to look up and see the creature towering over them. After the creature chews on Hud, killing him, Rob grabs Beth and the camera and hides underneath a bridge. He gives a final testimonial to the camera and tells Beth that he loves her. In the background, air-raid sirens begin to go off. A presumably nuclear explosion rocks all of Manhattan and seems to kill them both, and the camera is covered in rubble. The movie then cuts to a scene from Rob and Beth enjoying their Coney Island date a month before. During this, as the camera briefly focuses on the ocean, a meteor like object falls from the sky and hits the water in the distance, hinting at the creature's origin.
Odette
More mistakes in CloverfieldMore quotes from Cloverfield
Trivia: In the Audio Commentary the Director shares that when Steven Spielberg watched the film before it was complete, he came up with the idea of the helicopter radio explaining "If you can hear the sirens, you're in the blast zone" and the sirens ringing at the end.
More questions & answers from Cloverfield
Chosen answer: The actors and crew were kept in the dark as much as possible, unless the information was needed for their performance. They didn't know what the parasites looked like until they began filming the subway scene. Actual-size, realistic puppets had been made for filming but were decided to look too artificial and slow on camera, but it gave the actors a chance to see what they would be running from, how their jaws and legs worked, etc. As for the main monster ("Clover"), actors would only know what was in the script and what the director told them.