I was riding my bike a few years back, on a tour to Yosemite, and a very large motorhome passed me in the opposite direction. Right as it passed me, its retractable awning and awning frame that must have weighed a couple of hundred pounds broke off and fell to the ground. Fortunately, it missed me. If it had hit me, I have no doubt that I would have been killed or seriously injured. So weird!