During the movie, it's kinda ways into the movie. when Robie is fishing on the pier and the insurance man (John Williams) is talking to him. watch the scene when the two are in the same shot together when he says "as you've been safely in hiding these past few days why did you come out into the open?..."

look behind them...

they're facing away from the water, not towards it! he's fishing for cement fish! they're standing on water!