The morning sunlight is what caused them to turn to stone.
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They turn to stone when the are exposed in the sun
the trolls capture all the dwarves but not Bilbo b/c he his smaller so he hides then the trolls argue about what to do w/ the dwarves and how to eat them then gandalf (who had left them a while ago) comes back and imitates the troll to keep them arguing until morning and they get turned to stone
Trolls are evil imitations of the Ents brought into being during the Song of the Ainur at the beginning when Melchor corrupted the words and melody of a part of the song.Trolls are very stupid, large creatures, that are always hungry, but turn into stone when exposed to the light of the sun.
After they caught Bilbo, the dwarves came looking for him. As they got around the fire the trolls popped a sack over their heads. It all started when they caught Bilbo. As they were questioning him, Balin came in, quite unsuspecting of anything. The trolls jumped him before he knew what's what. Then they hid behind the trees out of the light and waited for the other dwarves, who they promptly caught in a sack.
No, but if they gum you, you will turn into a magnet and be forced to torture mormans for the rest of your pathetic little life.