This is one of my jobs. When there is something that happens, I have to do an analysis-the internetneeds me. In this case, it's a hit between Draymond Green and LeBron James. Was it a hit, or did LeBron flop? I'm not the judge, I'm just going to present evidence. Collisions When an object interacts with another object (with zero external forces), this is called a collision. Here are some important physics ideas about collisions. When two objects collide, there is a force.