When Ray comes to pick up Dave for the reunion, Dave comes downstairs carrying a corsage in a plastic box. When Dave asks Ray if he's going to call him "son" all day, the box and flower disappear.
On the way out the door from Dave's house, Ray asks Dave if he, himself can drive the truck. Dave says yes, and hands the keys to Ray. In the next scene on the highway, we can see from the long hair, shot from behind, that Dave is the one driving.