Rockfall events represent significant hazards for areas characterized by high and steep slopes and therefore effective mitigation controls are essential to control their effect. There are a lot of examples all over the world of anthropic areas at risk because of their proximity to a rock slope. A rockfall runout analysis is a typical 3D problem. but for many years. https://www.spidertattooz.com/USC-Trojans-9FIFTY-Snapback-Hat/