Subject-verb agreement

How i have seen people behave in a big event is that, for example if you are at a parade it can be very loud because it is a big event. Even if it is a country or state independence day and their is a parade for it it is going to be to loud. That is because if you are from that state or country you are going to scream because you are from there and you want to celebrate. So every time when you are at a big event you are going to notice that their are gonna be people screaming or happy crying. It can be any feeling that you wanted to be. So any person can have any feeling at a big parade. So i bet you that if you are at a big event you scream and you have any feeling that you want.