But if you start 
a swift-footed dog after him, you will enjoy it ever so much— 
especially if it is a dog that has a good opinion of himself, and 
has been brought up to think he knows something about speed. 
The cayote will go swinging 
gently off on that deceitful 
trot of his, and 
every little while he will 
smile a fraudful smile 
over his shoulder that 
will fill that dog entirely 
full of encouragement and 
worldly ambition, and 
make him lay his head 
still lower to the ground, 
and stretch his neck further 
to the front, and 
pant more fiercely, and 
stick his tail out straighter 
behind, and move his furious 
legs with a yet 
wilder frenzy, and leave a 
broader and broader, and 
higher and denser cloud 
of desert sand smoking behind, and marking his long wake 
across the level plain! And all this time the dog is only a short 
twenty feet behind the cayote, and to save the soul of him he 
cannot understand why it is that he cannot get perceptibly 
closer; and he begins to get aggravated, and it makes him madder 
and madder to see how gently the cayote glides along 
and never pants or sweats or ceases to smile; and he grows still 
more and more incensed to see how shamefully he has been 
taken in by an entire stranger, and what an ignoble swindle 
that long, calm, soft-footed trot is; and next he notices that he 
is getting fagged, and that the cayote actually has to slacken 
speed a little to keep from running away from him—and then 
that town-dog is mad in earnest, and he begins to strain and 
weep and swear, and paw the sand higher than ever, and reach
for the cayote with concentrated and desperate energy. This 
“spurt” finds him six feet behind the gliding enemy, and two 
miles from his friends. And then, in the instant that a wild 
new hope is lighting up his face, the cayote turns and smiles 
blandly upon him once more, and with a something about it 
which seems to say: “Well, I shall have to tear myself away 
from you, bub—business is business, and it will not do for me 
to be fooling along this way all day”—and forthwith there is 
a rushing sound, and the sudden splitting of a long crack 
through the atmosphere, and behold that dog is solitary and 
alone in the midst of a vast solitude! 

 
It makes his head swim. He stops, and looks all around; 
climbs the nearest sand-mound, and gazes into the distance; 
shakes his head reflectively, and then, without a word, he 
turns and jogs along back to his train, and takes up a humble 
position under the hindmost wagon, and feels unspeakably 
mean, and looks ashamed, and hangs his tail at half-mast for a 
week. And for as much as a year after that, whenever there 
is a great hue and cry after a cayote, that dog will merely 
glance in that direction without emotion, and apparently observe 
to himself, “I believe I do not wish any of the pie.” 
Mark Twain 
Perfesser Chaos wants to know how Samuel Clemens knew about sonic booms in 1872.