Most (all?) of the songs on this album have snippets of circus song at the end, and if you put them together they form a cohesive song. Not... not really sure why they did it that way, but um... the song is good.
The Jenny part is just part of the weird ongoing track on the Execution of All Things, which is mildly annoying the whole way through. That is literally the only thing that bothers me about this album, and this is my favorite off it.