In the movie The Princess Bride, the hero Wesley is attacked by fearsome Rodents Of Unusual Size (ROUS) in the fire swamp. Turns out, ROUS really exist!
Example of a Princess-Bride-era ROUS
A new species of rat, the size of a large cat, was confirmed during a scientific expedition earlier this year to the Foja Mountains of western New Guinea, in a remote region where people have rarely explored. The expedition was reported in National Geographic and yielded other new species of flora and fauna (like a tiny possum).
“The giant rat is about five times the size of a typical city rat,” said Kristofer Helgen, a scientist with the Smithsonian Institution in Washington.
“With no fear of humans, it apparently came into the camp several times during the trip.”
Hat tip darkman for bringing ROUS-sighting to my attention.