in the percy jackson trailer why does it show a truck with a turret not in movie though

yeah the truck with the turret made no sense at all. what the hell was the point of that if its not in the movie. adding insult to injury putting something in a trailer that doesnt happen in the movie. im glad that you pointed this out because that kinda pissed me off. CHRIS COLUMBUS WILL BURN IN TARTARUS FOR LIES HES TOLD AND FOR DEFILING THE GOOD NAME OF PERCY JACKSON!!!!!!!!11