If 당신 mean in the books, when Harry found Hermione and Ron in the hallway, Hermione's hands were full of the fangs and ron had a broomstick under his arm. But i don't know how there gonna do it in the movie ;P
I had this 질문 bugging me for quite a while, but, if 당신 remember, Ron was holding a broomstic. They probably used that 또는 Hermione did an awesome trick.
if u've read the books, it was mentioned quite clearly that Ron was holding a broomstick under his shoulders when they met Harry.And as there were no Riddle 또는 Basilisk as obstacles,they could have easily flew out of the chamber!