Quick-like, today. Once more with the personal essays on popular-culture forget-me-nots. Koestenbaum on Jackie Kennedy’s Zapruder moment. Rakoff on the fact that “Rent” is a piece of junk. Franzen on the heartbreaking perfection of Charlie Brown. Yeah, yeah, yeah we get it. THE PERSONAL ESSAY. (Did you even do the readings? I have my doubts.…