Corrected entry: During the Dementor's entrance into the train carriage, everything freezes. Because the frost effect is digital, the water level of the glass on the window sill does not change when it freezes. It should have risen as the ice grew in mass.
Myridon
5th Jan 2005
Harry Potter and the Prisoner of Azkaban (2004)
29th Sep 2004
Harry Potter and the Prisoner of Azkaban (2004)
Corrected entry: When Harry is wearing the invisibility cloak, he has to open the doors to the candy store and the bar when going in and out. However, when he is outside walking with Hermoine and Ron and near the shrieking shack throwing snowballs at Malfoy, none of the falling snow is accumulating on his head. If he can't walk through things when he is invisible, shouldn't the snow be landing on his head giving away the fact that he is there?
Correction: The snow is not accumulating on him because he is moving. Any flakes that do stick would quickly melt into the cloak, but in the meantime would just look to be blowing around oddly. If it were snowing very hard (or he was moving very fast), you might be able to notice the snow "avoiding" his space or swirling around him, but unless you were specifically looking for someone invisible you probably would not notice it or not realize what it was.
Join the mailing list
Separate from membership, this is to get updates about mistakes in recent releases. Addresses are not passed on to any third party, and are used solely for direct communication from this site. You can unsubscribe at any time.
Check out the mistake & trivia books, on Kindle and in paperback.
Correction: First nothing can change in mass, the ice may change in volume but not mass. If the water only froze on the surface or a thin layer all round the outside, the expansion in volume would be very slight. Third, even if the water froze all the way solid, it may have frozen fast enough and to a low enough temperature that it never had a chance to expand to its full volume (as ice gets colder it contracts again after a certain temperature).
Myridon