As for why the rescued boy said that he had a companion, he only said it when he was rescued.
First: When encountering this kind of thing, people are scared silly and their souls are gone.
Second: in the video, the two boys are seen holding the ice, how can they see the children who have sunk (the rescuers are already very good)
Third: In the case of being rescued, in addition to shouting for help to protect yourself, the brain is blank, let alone a child. Seconds to hear the video of the video