Make a Pigeon Sound With Your Hands

So, you want to to make a funny little pigeon sound with just two hands? It seems impossible, but it's actually quite simple when you've mastered it.

Steps

Raise your writing hand in the air, and put all of the fingers together until you feel a sensation that sort of hurts. Do the same with your other hand.
Rest your left pinkie (or whatever hand you write with, but left seems to work best) on top of the index finger on your opposite hand, so it looks like a perpendicular line from an aerial view.
Wrap your left thumb around your right thumb, still keeping your hands together. Then make sure that NO air can get through the position your hands are in. Another method to get like this is to wrap your right hand around your left.
Shape a small gap only with your thumb cream that is only a few millimetres wide, like a little thin-pentagon (or crystal) shape. It works more effectively If you shape it to the right hand side a little bit.
Place most of your lip on the top of your thumb, when the joint bone is on your thumb. Make the hole quite narrow, and blow slightly diagonally-downwards down your hands until you make a pigeon sound. It takes a lot of practice!
Once you are an expert, you can change the pitch of the sound even more by taking your outside hand and stretching it. When you straighten it all of the way, you get the highest. When you close your hands all of the way, it is the lowest. This takes a lot of practice too, so don't expect to get it on your first try.

If you are having trouble making any noise at all, make sure you are blowing at a slightly downward angle. This is key.
If you make the hollow inside your hand wider, then it will make a lower sound. If it is tighter, then it will make a high-pitched whistle.
Practice! It's very hard to get it in the position described above.

Be sure not to breathe too much into it, or else you might feel slightly dizzy. Only some people feel dizzy, though!
Don't lose the position if you want to stay like it the whole day.