Good thing I didn't get too far because I looked in the bag and realized I didn't have any fries either. I checked the receipt. Yes, I was charged for them so I was going to get them. I pulled up to the speaker again and politely told them what happened. I got my fries and it was good from then on.
I know this isn't the worst service ever, but the guy at the window acted like he was trying to rush me out of there and not taking the time to make sure I had my complete order. Usually when I go to this place, the service is good and everything is correct. I work in the service industry (so I was VERY nice about the mistakes) and I know how hard it can be at times to keep up with all the orders, but I was still a bit frustrated.