I have no idea where he learned that phrase

Saturday night we had our friends Sharon and David over for dinner and planned to play a board game after Ben went to bed. Well, lately Ben's bedtime routine has included three to five incidents of getting out of bed claiming he has to go to the bathroom, or he needs his covers or his Elmo slippers. But Saturday night he was in rare form. I think he was mad we were downstairs playing with friends and he wasn't included. He got out of bed at least seven times, for every imaginable reason. Heath put him to bed around 8pm, but he didn't go to sleep until almost 10. The highlight of the evening, though, was when he came out of his room and yelled down the stairs, "I'M TRYING TO SLEEP! KEEP IT DOWN!"