Braeden 8 yrs old - If all else fails resort to a joke?

Matthew is 9, Braeden is 8 and Matthew is intently playing a game on the iPad. Very intently ... so much so that he is not hearing (ignoring) every attempt Braeden makes to talk to him. Finally Braeden resorts to telling jokes feeling certain that will work. Still nothing! Braeden says, "UGGGH, Matthew I do not think you even know what a joke is!!!"