Being hit what what I hated the most about riding my bike. Pennies were most common. Beer cans, some empty, some not flew my way more than a few times. The one I still remember with a wince is being launched over the handlebars of my bike by the thunderous smack of some redneck's hand on my butt. I do have to say as I flew through the air and came crashing down, managing to land on the flat of my shoulder in a clumsy roll, his screams were like music. His little prank dislocated his shoulder and elbow along with snapping at least one bone in his arm.