Ben & Jerry's certainly doesn't have to invent anything new to hold our interest, but luckily they're excited enough about their new concoction they'll be slinging it for free this Saturday, July 18, from 11 a.m. to 3 p.m. at Macy's Cellar (170 O'Farrell at Stockton). Flipped Out! is a new portable snack (ice cream, fudge, and brownies) you invert before eating. Okay, guys, twist our arm.