The Cry of the Sloth

"Meanwhile, I have been practicing, and I believe I have learned to do a pretty good imitation of the sloth's cry. I place my thumbs firmly against the openings of my nostrils, blocking them completely. I then give a vigorous snort and at the same time fling both thumbs away from the nostrils in a decisive forward motion. The result is a woofling whistle which I imagine is quite close to what a young ai must sound like. I did it at the post office the other day when the clerk told me I had insufficient postage on my package."

~~ from The Cry of the Sloth by Sam Savage