The tourists were surprised to see an upright animal weighing 500 pounds, so their hands did not go anywhere.
In a video demonstration, a handful of fruit and a fence pass to the handler Louis.
At the age of 18, he uses his stance to keep the food clean when his hands are full.
The clip was created and the picture was shared at the Zoo Philadelphia Zoo.
More than 4,000 people and 1,300 tweets gathered as they roamed on March 5th.
Michael Stern, who works at the zoo, also tells you that he fires the fire hose, so Louis can get rid of the mud.
Stern says that for human gorillas, human behavior is “quite remarkable.”
Monkeys usually assume that they can buy food or take their swaps.
Louis, Missouri, May 1999 Louis was born at the Zoo, but moved to Philadelphia in 2004.
One of the two dogs in the zoo.
Gorillas are the largest live primate known to mankind.
Their DNA is 95 to 99%.