Because I'm presently hungry, I'm going to completely ignore the comics content of this post, and discuss the 'special chips'.
Primarily I think it's ketchup, yes... that's the one I've heard from people in the states that gets shock and awe. I've also had some people in the states get surprised at the concept of dill pickle chips (but others seem to know it).
But my present favorite kind of strange chips is President's Choice 'Greek' chips - feta, oregano, and olive. OMG. I say again, OMG. I'd say I practically cleaned out my whole local store of them single-handedly when they first came out, but probably not. They're always out now, though, and last time I saw them, they went from a full shelf of them to an empty shelf over the course of a weekend... and none of the other chip flavours they make were touched.