Wow! There is a VERY rare coupon on Facebook right now; a Chipotle Mexican Grill Buy One, Get One Free coupon. Chipotle is by far our favorite fast food chain and they rarely have coupons. Go here and like them on Facebook. Then, click on the "Americas Next Great Restaurant" link from their status update and watch the video. After you watch the video you will be able to print a coupon! Mine expires 03/03/11.