Anticipating the car ahead will actually move when the light turns green will result in a fall. Anticipating the car ahead won't stop unnecessarily will result in a fall. All muscles in both legs cramping simultaneously while climbing will result in a fall. Trying to look smooth by unclipping one foot at exactly the right instant will result in a fall. Launching and clipping in on a slight uphill in wet grass after an extended sag stop with hundreds of onlookers will result in a fall. Riding a loaded touring bike at very slow speed one handed while attempting to toss a tin can in the campground dumpster will result in fall. None of these were, I mean will be fatal, and all are avoidable with a single rule: Don't Do Stupid Things.