Specify that this order is "To Go".
Drive through the drive in backwards and let your rear seat passenger make the order.
At midnight, ask if you are too early for Breakfast.
When ordering, start talking about the problems you were having with your car. Ask if somebody can take a look at it.
Pay for a large order in pennies and nickels unwrapped.
Laugh loudly when asked if you would like fries with your order.
Demand to speak to the manager. When he comes on, complain that you did not like the way the employee said "Would you like fries with your order?"
When asked if they can take your order, tell them you are just looking and drive off.
Tell them you have to use the bathroom - Don't order anything.
Order a hamburger, no bun with two ketchup sachets - That's all.
Just stare at them when you pay and get your food. Don't break your stare and say " I know what you did to my food!"
When they hand you your food, hand them a bag back with all the rubbish from your car in it.
Honk your horn the whole way through the line.
When they come on the intercom, say "Sorry, I'm not here at the moment, please leave me a message."
Pretend like your window is broken. Tell the employee this. Order with your door open, pay with your door open. Roll down window and take food through the window.
Stand close to the speaker and yell your order, using colorful expletives in ways which would embarrass the patrons inside.
After ordering, cover the speaker and mic with transparent tape. Watch as customers and order-takers are unable to hear each other and, thus, each raises his/her volume.
Speak a foreign language (make one up if you have to). When the manager comes to the mic, speak English and inquire as to why the order taker had such difficulty understanding you.
Attempt to take the order-takers order ("Hi, may I take your order?") before they get a chance to take yours.
Order confusing items, i.e., "Hi, I'll have a large orange Coke and a small medium fries, please."
In a crowded drive-thru line, place a HUGE order, then slip out of line and watch the fun as the person behind you is handed 40 bags of food.
When you arrive at the window to pick up your food, hand them several bags of garbage and ask if they'll dispose of it for you. Make sure it smells.
Drive through with a car load of naked people.
Speak in such a garbled fashion that the order-taker will think there is a problem with the speaker and ask you to order at the window. When you arrive at the window, speak in the same garbled, incomprehensible fashion.
Drive through with someone on the hood to accept the food.
Bring along a Mr. Microphone. When the order-taker speaks, aim the mic at their speaker but do so while aiming the Mr. Microphone speaker at the mic to produce excruciating feedback of their own voice.
Have a friend hide in the trunk. When you approach the window to pickup your order, have him start yelling and banging his fists on the trunk.
If you are a male, have a female friend place the order by speaking VERY seductively and suggestively into the speaker. When she finishes, have her hide and pull up to accept your order. See how many of the order-taker's fellow employees have been called over to the window to "check out the babe."
All of the above work very well when done at the late night pick up window.