The thing about being a zookeeper is that you're really effective only if you're able to keep the animals in the zoo. In July 1964, a zookeeper at the Fleishhacker Zoo (now the San Francisco Zoo) had a really bad day. First, he got a call from the police saying they had captured 13 buffalo that zoo director Carey Baldwin didn't even know were missing. Five hours later, he received another call. This time, again unbeknownst to Baldwin, a 300-lb. (135 kg) pygmy hippopotamus had escaped and was taking a stroll down a nearby road. A short while later, a large South American rodent called an agouti (pictured here) made a run for it. A dramatic chase ensued, and the little guy was eventually captured. At the end of his day, Baldwin told the Associated Press he would review the zoo's security.