All Creatures Great and Small (All Creatures Great and Small, #1)

by James Herriot

and Mr. Sidlow, describing the treatment to date, announced that he had been pushing raw onions up the horse’s rectum; he couldn’t understand why it was so uneasy on its legs. Siegfried had pointed out that if he were to insert a raw onion in Mr. Sidlow’s rectum, he, Mr. Sidlow, would undoubtedly be uneasy on his legs.

Best paragraph I have ever read.