Harry Potter and the Prisoner of Azkaban - Tuck in Your Time-turner
In the movie when Hagrid is teaching his class about Hippogriffs, and then when Malfoy is attacked, Hermione comes up saying "Hagrid! he has to be taken to the hospital." Look around her neck, you can clearly see the Time-Turner chain outside of her school uniform. I thought she was supposed to keep it hidden? Someone could know if they saw...