The trivia item below may give away important plot points.
When Travis and Gellar are praying, Travis looks over at Gellar and sees blood very clearly on the side of Gellar's face. He looks at Gellar quizzically, looks down for a moment then looks back at Gellar to see the blood is gone. Seeing this seems to confuse him more before Gellar shouts, "Eyes on God". This implies Gellar is a figment of Travis' mind.