Department policy in the past has been as long as you were in line when the first firework went off you were guaranteed a ride. However, when it comes to loading the final train, if there are 6 people waiting in line for the front or back seat and there are open seats in the middle, they will make those 4 extra people take on of the seats in the middle. Usually they will say something along the lines of: "This will be the final train of the evening, please find an open seat at this time."