What are some challenges Percy Jackson faces in Chapter 17 in the Lightening Thief?

Percy, Annabeth, and Grover ran into a group of bad kids. in panic, Percy uncapped his Sword, even though it only works on monsters. Percy gave them enough time to escape. they hid In 'Crusty's water bed place' and was greeted by the owner, Crusty, whose real name is Procsrustes, which means 'the stretcher'. Crusty tried to stretch and kill them on the beds, but Percy outsmarts him and kills him