I couldn't keep count of how many times I escaped going over a turn and into the valley below, while mulling over what's holding stuff together on the mountains in this region!!!! Even though every once in a while, a tiny pebble that may have been stuck atop a mountain for millions of years, decides to wiggle its way out and comes down hurtling towards you. On contact, they will make an extra and unwanted hole in you or your bike and for that reason, are called shooting-stones.