[@Airalin] Although, given that Aaron grew up in a city with one of the highest murder and gang violence rates in America, Lyra would have a tough time putting a frightening image in his head.  He's sorta like the Joker, except he isn't a chesmist or engineer, has basically an infinite supply of energy, and does not try to kill people he knows on a regular basis.

EDIT: I'm now taking guesses as to where Aaron grew up, winner gets to not be electrocuted.  Or a fresh batch of cookies, your choice.