Tonight whilst driving about getting the baby to sleep, i popped into the drive through McDonalds. Having been stitched up by them in the past forgetting items from my order, i checked the bag to make sure my order was correct. Sure enough they had forgotten the curry source dip!!! Criminals!!! So i drove back into the drive through, confused the person at the first window by telling them I was only there for the source they had forgotten... Got to the second Window where you pay, explained the situation and he was very apologetic - we had some friendly banter... Got to the third Window where you collect the food and the woman handed me a bag of food!! Now had I been the dishonest (or very hungry) type i could have take the food and sped off, but I'm an honest memeber of society, not actually hungry, and i just wanted my curry dip, so i explained she had forgotten my dip and she gave me handfulls of curry dip - more curry dip than any man could possible eat with just six nuggets to dip in!! So it seems there is no mechanism for McDonalds to register a car passing through the drive through to collect a mistake meaning you will get handed someone elses meal, most likely the person who ordered after you... Free food!!