He describes how the Rio Cuerto impactors struck Earth at such shallow angles that they literally skipped across the surface, carving long grooves into the ground before coming to rest. The physics of these low-angle impacts created distinctive ridge and groove terrain patterns still visible today. One of the smaller craters in this field measures 250 meters across, surrounded by this characteristic scarred landscape. The evidence suggests these weren't vertical strikes but grazing blows, objects entering the atmosphere at trajectories that allowed them to bounce and gouge before final impact. It's a reminder that cosmic collisions don't always follow the Hollywood model of straight-down destruction.