"Go, Silver, Go!" joke

A man was driving his truck down an old country lane, when his truck stalled and fell into a ditch. Well, it just so happend to be that there was a farmer about a block away from the accident. The man saw that that farmer had a horse and asked if his horse could pull out his truck. The farmer said "
Ok, here, can you hold these?"
yet the farmer handed him nothing. The man looked at him with curiosity, and and started to ask"
Why a..."
but the farmer cut him off by putting a finger to his lips. The farmer garbed the horses lead rope and folowed the man to his truck. So, when they got there, the man attched the 1 horse to the truck, and then stomped his feet, as if to imatate walking. Then finally, he said, "
Pull Silver, pull!"
"
Pull Ginger, Pull!"
"
Pull, Buddy, Pull!"
"
Pull, Geto, Pull"
Silver started to pull, and then soon the truck was out of the ditch. The man said"
Thank you, Sir"
he handed him a 20$ bill and was about to get in his truck, when he asked"
Yo, Why didnt you hand me anything when u lead Silver, and why did you call 3 other horses names?"
"
Well,"
The farmer reaplied, "
If I had on said "
Pulls, SIlver Pull"
and he knew he was the only horse here, he wouldnt of budged!"