the fly in my car

So there is this fly in my car. Just a normal fly, like any other. I noticed it about a week ago. And guess what? ITS STILL THERE! The funny thing is though, it only flys around when Im driving in my car, I've looked into my car windows before and its NEVER flying around. Even when I have the windows WIDE open, it DOESNT MOVE!! Isn't that just a little weird? I do not get it at all, I think the fly likes to bother me for some weird reason. Its always up by my face to. Ive decided to name my fly Matt. I dont know why I chose the name Matt, I just like that name.