July 22 (UPI) -- A zoo in Thailand used a mascot version of its most famous resident, Moo Deng the pygmy hippo, for a drill testing zookeepers' response to an animal escape. The drill at the Khao Kheow Open Zoo featured a staff member in a Moo Deng mascot costume staging an "escape" from an enclosure and going on a rampage through the publicly accessible areas of the zoo. "The control team proceeded to close off the area and bring the hippo back into the pen safely," the zoo said on social