Whenever anyone mentions the word possum, I immediately recall the Simpsons episode where Homer conducts the monorail.
However, unlike the possums found in Homer's closet, the animal you see right above is a western pygmy possum, native to Australia. It might look absolutely tiny, but it's actually one of the largest species of pygmy possum in the world. Another interesting fact is that like all pygmy possums, the western pygmy possum is great at entering mini hibernating periods called torpor.
Source: http://www.australiangeographic.com.au/blogs/creatura-blog/2014/09/western-pygmy-possum-burramyidae/?utm_medium=social&utm_source=facebook&utm_campaign=soc.fb.140925.pygmypossum