The first thing I ever saw that really got me thinking about story arcs and stuff, was, believe it or not, a Ren and Stimpy cartoon.
In it, Ren and Stimpy are flat broke. Ren dresses up as a mouse, so Stimpy can charge for his services as a mouse catcher. The plan goes well, until the marks ask Stimpy to eat the mouse. Rather than give up the game, Stimpy puts Ren in his mouth and slowly chews. Ren tries to bear this treatment as long as he can, but he finally snaps; he pops out and yells that he is not a mouse, he is a chihuahua. (And pulls out his pedigree to prove it.)



