sentence1: But risking holiday sentimentality (with the ready-made excuse that it's just the chestnut stuffing talking), I'd like to mention some things I'm thankful for, like Tim Carvell's two (!) responses involving pushing people or poultry out of airplanes; Jennifer Miller's two (!) bits of self-revelation about her dark and ferocious inner life and apartment; Larry Amaros' determination that the Olsen twins wander parched and frightened, not merely in the Serengeti but during the dry season.
sentence2: I won't risk holiday sentimentality, so you won't hear what I'm thankful about, at least not from me.