Well, absolutely nothing if you're a sloth.
This according to the July issue of Awake! (Watchtower publication, governing body of Jehovah's Witnesses). My resident JW gave the mag to me last Saturday. Hadn't seen him in a few weeks as he was making care taking/relocation arrangements for one of his in-laws (I believe). The articles pertaining to different species and parts of the world seem to be more valuable IMHO than the theology-driven articles, but they do have religious-theme overtones as well. He's been visiting me on and off now for over two years, ever since the day after I was sacramentally confirmed in the Catholic Church, actually.
In any event, the sloth can die of starvation with a stomach full of food, especially in a cooler or shady environment, seeing as how the sun's warmth is "indispensable" to digestion. The green-tinted coat is algae which serves as nutrients for the host, and under certain circumstances camouflage (like in a tree). Costa Rica has plenty of them (sloths that is). Zookeepers are grateful that sloths go potty 1 and 2 only once per week.
Another amazing fact is that it's hair parts around the belly and grows down around its back. Because it spends most of its time upside down hanging from a tree, the hair pattern serves as a runoff for rain when tropical outpours occur. Purportedly sloths survive severe injuries as well as having a quick recovery time, thus staving off infection.
The punch line was that people under a hectic pace and always on the go should slow down a bit and be easy-going insofar as they can. Way easier said than done (for me at least).
Though Watchtower literature, some might say, is propaganda-laden, I do enjoy the colorful little illustrations with all the exotic animals (they believe the vast majority of those who are saved will live in an earthly paradise, next to lions, tigers, zebras, cockatoos, peacocks, what have you). This youtube clip, though theologically driven, is one of my favorites due to the ominous (spooky!) music and the excellent earth/nature-shots (sorry, no exotic animals:-( ..)