In the Film, Elliot Tiber is portrayed by Demetri Martin. The hippie couple in the van were Paul Dano (Paul/Eli Sunday in "There Will be Blood") and Kelli Garner.Song in the van: "The Red Telephone" by en.wikipedia.org/wiki/Love_%28band%29 I like this movie, and have always been fascinated with the Woodstock Festival and the events surrounding it.Enjoy.