haven't had that happened to me. Only thing I get sometimes are some cars that pass by and blow their horns right as they are passing me. I dont know if they know me and are trying to say hi or trying to make me fall off my bike, any who- it annoys the h*LL out of me. OOhhhh whats even worst this scares me, is when I'm riding, in the zone focused, pedaling and doing my thing, and this car passes by and theres a dog and the window is down and the dog just starts barking really loud as it passes, it just startles me, one time I almost lost control of my bike because I was taken by such surprise.