I bought my helmet new, back in 2003. It's an Icon Alliance, and if I'm going over, say, 45mph, the face shield literally almost disconnects and flies off when I do an over the should look before changing lanes. It's friggin scary, and could be super dangerous! Is this normal? I don't mind buying another helmet, but I'm just curious if this happens on all/most helmets, or did I just get a dud? Thanks.