Check out this crazy drive-thru situation at a McDonald's I visited recently. They were doing some construction to the drive-thru lane and had to route people out into the parking lot. They had this one young lady with a headset on relaying orders to someone inside at the register. The challenge of ordering was compounded by the fact that you could hardly see the menu off in the distance. You can sort of see the side of the menu against the wall beside the ladder.
Next, the fun really picks up as another lady comes up to your car, takes your money, runs back to the window, pays, gets the food and runs back with everything. God forbid you asking for anything extra after that!