MIAMI – A college student who narrowly escaped from a car that got smashed by a collapsing bridge said he watched helplessly as the structure tumbled down on top of the vehicle and killed the friend who was sitting next to him in the driver’s seat. Richie Humble, who studies at Florida International University, was riding in a car under the pedestrian bridge when he heard a long creaking noise coming from the structure that spanned a busy Miami-area highway.