Not so obvious, actually. Henne is clearly showing the ball to the tailback. You don't normally play-action on a screen. That calls attention to the TB, which is what you DON'T want on a screen pass. Possibly it could be a tight end screen. But the odds are just as good that this was some kind of busted play. Maybe there was a whistle that stopped play, and the photographer just happened to snap this photo at just the right time.