Would you laugh if a little boy sitting in the front kept loudly saying Amen during a long drawn out prayer?

at first he says Amen, quietly while preacher's still praying, then louder says Amen already, his mom is trying to quietly quiet him down but he then says loud enough everyone could hear and obviously upset he says mommy but mommy, i don't think he heard me, its supposed to end when you say Amen, why is still talking?