Dumb Fred zoo day joke

Fred was definitely more than a bit dumb? when his pal asked him how he had enjoyed his day at the zoo, he replied, "it was a total con! I saw a sign that said To The Monkeys, so I followed it and saw the monkeys. Then I saw another sign that said To The Bears, so I followed that and saw the bears. But when I followed a sign that said To the Exit, I found myself out on the street."