Next time you’re zipping down a nice long hill where you can see ahead and it’s safe to mess around, cant your head to the side, open your mouth making a nice round O with your lips, and move your head slightly until you get the wind passing your lips just so. With a little trying, you’ll produce a wonderful whoooooooo sound, just like what you get when you blow over the top of a Coke™ bottle. On group rides, this trick will amaze your buddies.
