Crowd interaction is a real-life subject that usually refers to multiple organisms sharing the same space. One big example is the human life, how humans interact with other humans and also other species. The decisions that we make most of the time involve other people, from the simple decisions to the most advanced and complicated ones. Let's assume that we want to buy a ticket for the cinema and the movie starts at 3pm. If we were the only ones interested in watching that movie, we could arrive only 2 minutes before it starts to buy a ticket and we would be on time to watch the movie. But if more than 100 people are interested in watching that same movie, we need to anticipate that and arrive much earlier at the cinema so we have time to buy the ticket. Once we arrive at the cinema, there are rules about how we should wait until it is our turn to buy the ticket. Usually we wait behind the last person that is in the line. This behavior is an example of crowd interactions...