Firstly fold the A4 paper down the middle.
Now fold the bottom of the paper so that it's in line with the centre fold.
Fold the paper down the centre and open it out so now there's a fold down the middle.
Now fold the bottom corners in so they touch the middle line.
Next fold the corner in the centre of the paper so the tip touches the the middle line, do the same on both sides. There should be a little bit of paper poking out from the top. Try at make both the centre tips touch in the middle.
Now fold the point at the bottom up so it touches the tips in the middle.
Now using the centre line fold the whole thing out.
Now fold about 2cm from the bottom of the paper on both sides to make the wings!
Now you're finished. this plane is a psycho plane because it flys mega fast like it's trying to kill someone! throw this plane over arm to see it's full blast! Enjoy the coolness of this plane!