NEAR-PERFECT EVENING WEATHER FOR AN OUTDOOR SCREENING of Back to the Future? In September? What are the odds? Well, the odds-makers were smiling on the annual Sleeping Bag Drive-in. Hundreds of students gathered on the grass of the Quadrangle for a movie under the stars. Clear skies, remnants of a warm late-summer day, and only the slightest breeze made sleeping bags purely optional. Best part: the student society’s food bank was stocked with donations from moviegoers.