Had my gf out this weekend for some riding, weather in Alabama was made for riding this weekend. About 20min into it I kept getting knocked in the back of the helmet with hers, couple of times she twitched on me, at the next stop I turned and ask if she was ok, come to find out she was falling asleep back there and couldn't help herself. This happen anyone before? Seems that could be a potential safety issue...anyways, guess I'm a pretty smooth rider