Nothing signifies a rousing shindig like the distinct sound of splattering vomit, especially when it’s a Halloween party based on an infamous horror film!

The Exorcist is arguably one of the greatest horror films of all time, and this project recreates the iconic moment when the demonically possessed little girl intentionally projectile vomits onto the priest who is attempting to purge her of an evil presence. By simply outfitting a creepy doll with a battery-operated submersible pump, you and your party guests can fill your cups with green punch that the possessed doll appears to be vomiting into an ordinary bowl.

So, go ahead and exercise the demons at your next Halloween soirée until all the demon juice is gone!

(This tutorial originally appeared on Makezine.com)

Step 1: Gather Materials

There are three main ingredients to this project: a doll, a submersible pump or siphon, and a punch bowl.

The possessed girl played by Linda Blair in The Excorcist is supposed to be 12 years old, so I tried to find a doll that looked closer to that age. This meant that I had to drill a hole in the doll's mouth and the back of the head to thread in the vinyl tubing from the pump. So, if your doll doesn't already have holes in the mouth and head, then make sure that the head is hollow and can been easily drilled through.

I chose to use a submersible pump that I took from a battery-operated tranquility fountain so that the doll could sit on a table without having to be plugged into an electrical outlet. But, a siphon pump is a potentially quicker, cheaper, and easier way to make this project work. The only difference is that the punch may need to be pumped from a vessel that is placed above the doll's mouth.

Step 2: Drill Holes

Drill a hole in the doll's mouth. Then, find the most discreet location on the head to insert the vinyl tubing. I chose a spot on the back of the head that would be covered by the doll's hair. You may want to tap a nail into the plastic first to make a hole to drill into.

Step 3: Insert Vinyl Tubing

Make sure the holes you've made are big enough for the tubing to squeeze through. If you have trouble getting your tubing through both holes in the head, then try pushing a piece of wire through the holes first, and then thread the tubing over the wire.

Step 4: Check Pump Connections

I chose to add a piece of tubing to my pump so that it wouldn't have to be submerged in the punch bowl and could be concealed, along with the batteries, behind the doll. For this to work, you have to get the liquid into the pump when you turn it on. I used a hot glue gun to attach the tubing to the pump and give it an air-tight seal.

Step 5: Demonic Makeover

To copy Linda Blair's makeup in the vomiting scene, I used a comb to get rid of the doll's curls, and oil pastels to add color to the face, but painting the eyes white was the key to getting that demonic possession look!

Step 6: Position Doll

The doll should be positioned with its head a least slightly over the brim of the punch bowl so that the punch will pour back into the bowl. To do this, I simply tied the doll's arms and legs to the bowl with white bandages and secured it with medical tape, similar to the way Linda Blair's character in The Exorcist is tied to the bed.

Step 7: Green Punch

After doing a little research on green cocktails, I came to the conclusion that a Midori Sour might be the best concoction for this project because of its green hue (drinks that are too thick, syrupy, or carbonated might not work well with the submersible pump.) There was a Midori Sour recipe right on the bottle that I bought, but you may have to experiment to find the mix that works best. It's used one part liqueur to 2 parts sweet and sour mix to 1 part lemon juice (if you use juice, make sure there's no pulp).