The Sumatran Rat-Monkey was the cause of the infamous zombie outbreak and the main antagonist of the gory comedy-horror film Braindead. it was a dark parody of an animal suffering from rabies but was unlike anything nature could create, with a horrifically violent nature and a bite that could turn people into zombies.
The Sumatran Rat-Monkey managed to sink its teeth (literally) into the complete monster known as Vera Cosgrove - who reacted to the trauma by killing the monster single-handedly, however the bite would soon take effect as Vera took on the role of the "master zombie" in the future invasion.
In the 2005 remake of King Kong, also directed by Brain-Dead's Peter Jackson, an animal cage stowed in the hold of the SS Venture has a sign reading "Sumatran Rat-Monkey". Luckily for Jack Driscoll and everyone else, it is empty.