Dolores Umbridge's office at Hogwarts was not impervious to this spell like the article says it is. Harry uses the spell to open to get into the office in the first place right before hes about to use the flu powder to get to the department of mysteries. I'm talking about the movie here, not sure if the book is any different, (can't see why it would be) 124.169.123.133 15:55, 11 November 2008 (UTC)
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