I have not seen a Harrier but it may exist. I have seen a weird prop driven aircraft that had the ability to take off vertically. I'm not sure what they call it. I have the video file I could send you if you wish. It's 18.5 MB but it's pretty cool. It looks kinda dangerous to me though with props near the wingtips pointing skyward. Kinda interesting. PM me if you want it. I will need your email to send it to ya.