There are always patterns when you are facing a cocky person or if you give a person confidence. There is saying that giving a person an inch will always result in them wanting a mile. This means that individuals are never satisfied with what you give them. By giving in just a little, they will see weakness, and will want to keep pushing.
In situations of confrontations, once someone thinks they are above you, they will begin to act even tougher than before. In addition, they also tend to speak more than necessary, as they think they are safe and superior. Of course, this can often result in them eating their words.