How did Piggy's glasses break?

Piggy's glasses get broken when Jack gets back from where ever and everyone is angry at him because he let the fire go out and a plane has just gone by or a ship i cant remember ... piggy stands up to him and says "you said you would keep the fire going" which he didn't. jack gets angry as piggy is standing up to him and "stuck his fist into piggy's stomach" he also "smacked piggy's head" which made his gl;asses fly off and tinkle on the rocks.

hope this helps

sorry if its a bit crap

*Piggy's glasses get broken when he tripped on his own feet and fell on them, he is fat and crushed them

Piggy's fat did not crush his glasses. Jack broke them when he got back from hunting. Everyone is mad at him because he let the fire go out and a ship just passed by. Piggy stands up to him and Jack smacks him in the head which sends Piggy's specs flying. That's how they broke.