First you get a new cell phone (with no caller id that'll be known on the other line, but put one on, then change it). Then you tell them that "This is the burger mush, we serve best meals, what can I get for you". They be asking stuff and you reply "Would you like to order a double cheesebuger to go with your (whatever they said)". They would complain because why would they want to eat bugers. Also say that "Your total is $319.99". They would be complaining because how much they have to pay. Trust me, it does sound sick, but you'll be laughing 'till your wet yourself.
Call Up A Chineese Resturant, place an order, say hold on, call up another chineese resturant tell them to hold on, then go back to the other line where the 1st Resturaunt is and say my friend is here he might wanna add to the order so hold on while I get him and go back to the 2nd Resturaunt, and say, ok here is my order but hold on one sec, and go back to the 1st Resturaunt and say ok here's my friend add onto the order what ever he wants and say the same to the 2nd resturaunt and put them on the line together, they'll talk to each other, it'll be confusing and hilarious!