'Sir'? [Bart wrinkles his nose at that, clearly displeased. does he look old to be called a sir, really??] Dude, even my grandpa doesn't get called 'sir' and he's like--super-old.

[he was about to say forty, but a fourty year old man with a thirteen year old grandkid is kind of really questionable. besides, fourty is still ancient in Bart-years.]

You can call me Impulse instead. That's way more crash than 'sir.'