Odysseus and his men had got in into a kyklope's cave and started eating its food.They got caught up in the moment they forgot to hide and take cover.
When the kyklopes came in they noticed Odysseus and his men.They gave them hospitality and gave them gifts for their journey.
Then all of a sudden the kyklopes come to feast at their friends house.
Confused and angry that their friend died the kyklopes targeted Odysseus and his men.
Odysseus then out of nowhere stabbed the eye of one of the kyklopes. In horror.
The kyklopes managed to eat all of Odysseus men and destroyed his ships leaving Odysseus stranded.He then killed all the kyklopes after a year of hiding and made a raft from their clothes and went home.That was when Poseidon found out and wanted to end Odysseus legacy.