There are some people who when drunk, cannot seem to control themselves. They start radiating a confidence that is hard to match, and begin to start altercations as if they are invincible. First thing they tend to do is either directly start a confrontation with the intent for a physical altercation, or just plain talk trash to random people.
Talking trash can start many things. By running one’s mouth, one can easily escalate something. There are individuals with anger issues and also individuals who do not like taking disrespect. For those who like to run their mouth, it would only be a matter of time before they do it to the wrong person.