Claude is somewhat surprised to discover that voices in his head have also painted signs on the side of the road. For example, here above the tank of foot-nibbling "doctor fish": YOU CAN GET A NEW EXPERIENCE! IF YOU DON'T TRY YOU WILL REGRET IT FOREVER!! This is definitely the same voice he has in his head. The shouting letters, the threats, the regret and, above all, the exclamation points. He recognizes it all. It’s the same pushy guy.
He feels serious kinship, too, with the sign that reads REHAB CRAFT.