Shut Up And Trouble

There were these two brothers named Shut Up and Trouble.
One day, Shut Up couldn't find Trouble and so went out looking for him.
While he was looking, a police car drove by and stopped.
He asked, "Hi, kid, what is your name?"
The boy answered him saying, "Shut Up.
" The cop, trying not to get upset, again says,
"Answer the question, what is your name ?"
Confused, he replies, "Shut Up!"
The policeman, now getting very agitated says, "okay kid, are you looking for trouble ?
" Shut Up, very excited, answers, "yeah, have you seen him ?"