Adam,
Are you referring to back to back short holes or my reference to short, then back breakingling difficult? If you're referring to the latter, there are too many to count, I'd bet. Numbers 17 and 18 at Oakmont come to mind. I'm sure others will too if given a minute. From what I recall, each short par-four at Ballyneal is blanketed by a monster (6-7, 9-10, 12-13 and 13-14). But it also has two great short ones in a row as you mentioned (7-8).
One doesn't see too many great back to back short holes anymore, that's the reason for my original comment RE: Sand Hills 7&8 and CPC 8&9? Would there be any at Merion? I just think it's cool that you can have two short holes in a row - all too often length is just too much of a consideration nowadays.
Unfortunately I don't get out enough these days so my choices are limited. Creating a great short par-four is an art, and it's one I'm glad that a few of our better archies nowadays aren't afraid of building.