"Coaster Boaster"

The following text is taken from a roller coaster webpage:

" You reach the top of the hill, and finally realize that being in the front seat wasn't the best idea. You find yourself hanging over the ledge for what seems an eternity, and finally you feel the force of the back cars push you down the steep first drop into the most terrifying two and a half minutes of your life."

What wrong physics do you see in this text?