John is taking part in a student protest, marching across police lines into an important administrative building on campus. he is so wrapped up in the group mentality that he actually stops thinking about himself as an individual who is separate from the group, and fails to ask himself whether or not he is behaving responsibly. john is probably experiencing

John's behavior is an example of deindividuation where an individual loses one's self or self awarness once he or she has join or immersed in a group. This likely makes a person lose the ability of thinking whether what the individual is doing is responsible or he or she is acting accordingly. It is like how John behaves when he was so wrapped up in the group that he does not think if what he is doing is even responsible or is right for him to do so.

They went to leyden, holland