It includes a part where some choppers flying in the UK suddenly get caught up in an extreme drop in temperatures, get iced, and drop out of the sky.
The film was a total work of fiction which drew heavily upon prevailing scientific opinion, but was criticized for over-the-top predictions. The main criticisms from scientists was the time-scale. They said all these things were not possible in the short span of hours the movie shows, and that the extent wouldn't be so exaggerated.
Nature may be a little more imaginative.
'Ice build-up' on crashed plane http://news.bbc.co.uk/2/hi/americas/7889764.stm"The crew of a plane that crashed in New York state killing 50 people noticed "significant ice build-up" on its wings before it crashed, investigators say.
Analysis of data recorders recovered from the scene shows the plane made a series of severe pitches and rolls seconds before plunging into a house. "