Additions and Deletions from Book to Movie

[Tamara]

In watching the preview for the newest HP movie, I saw a scene where 
Harry was falling out of the flying car over the Hogwarts train.  I 
re-read the book and that wasn't in it.  What other things were added 
to the previous movie that were not in the book?  Did you agree with 
them or not in adding these things?  And the same question goes for 
what was deleted from the book.