If someone cut in line in front of you, what would you do?

If this happened to me I would politely tell them that I had been waiting and the end of the line was somewhere behind me.  Cutting in line is wrong and I would hope the person would realize that and move on their own.  If this not happen, meaning if they not move,  I would tell my mommy.  If her was not with me I would look for another adult to tell.  One thing I would not do is push them or try to make them move.  Fighting is not the right thing to do either.  So that is what I would do if that happened to me.