Scary truth or vivid imagination?

Most morbid conversation overheard on the way to the gas station - Joshua trying to convince Silas that he didn't need to get out of the car: "Silas, if you get out of the car, a garbage truck is going to come and smash you. Then when you're on the side of the road dead, vultures will come and peck at your body and I'll never see you again! Is that what you want to happen?!?"