So in this scene, the minotaur is chasing Percy's mom and Percy himself but then Percy's mom gets paralyzed by the minotaur and her last words were to go to camp half-blood where he will be safe.
So this scene is about when Percy fell into the Santa Monica beach in L.A because of Mrs. Dodds. She and the other furies came to the beach and Percy fell in it. When he fell he met a mermaid who gave him three pearls to use and started saying some other words. Like he was dreaming or something.
This is the scene when Percy, Grover, and Annabeth went to this hotel and they fell in the trance because of all the free games they could play and Annabeth was like OMG and they tried to leave. But Grover and Percy were stuck to the game.