Hold the egg in one of your hands, and the needle in the other. Carefully push the needle in the top and bottom center of the egg.
Widen the hole at the bottom using the scissors or simply by moving the needle in a circular motion. This is where the inside of the egg will come out, check the picture to see roughly how large the hole should be. Make sure to poke a wider hole at the bottom than the top. You don't need to widen the hole at the upper part of the egg.
Take the needle and push it into the hole at the top of the egg a few times carefully but with a bit of force so it pokes through the membrane inside your egg; stir it around to break up the yolk.
Hold the egg over the bowl with the bigger hole facing down. Blow through the upper hole (be careful not to blow too hard) to get all the yolk and white out.
Clean the shell by holding it carefully under running water.