Salty Nuts "assaulted"

So my dad told James this joke the other day. "Two peanuts were walking down the street but one was 'assaulted". James LOVES jokes especially when he figures out why they are funny. This one took some time to explain. Last night he tried to retell it to Brian,and that conversation went something like this:
J: "Dad, did you hear about the two nuts that were walking down the road?"
Brian: "No"
J: "W

ell, one was salty".
Me: "Um, try again James that isn't what Grandpa said"
J" Well, um like he was ..... whats the word........jacked!
Brian: (smiling) - " I don't get it"
Me: " ok let me tell it - two nuts were walking down the street and one was 'assaulted'. oh and where did you learn that word James?
If I ever write a book it just might be titled: James and the Salty Nuts!