Lynne Truss

“A panda walks into a cafe. He orders a sandwich, eats it, then draws a gun and fires two shots in the air.

"Why?" asks the confused waiter, as the panda makes towards the exit. The panda produces a badly punctuated wildlife annual and tosses it over his shoulder.

"I'm a panda," he says, at the door. "Look it up."

The waiter turns to the relevant entry and, sure enough, finds an explanation.

Panda. Large black-and-white bear-like mammal, native to China. Eats, shoots and leaves.”
― Lynne Truss, Eats, Shoots & Leaves: The Zero Tolerance Approach to Punctuation

“Thurber was asked by a correspondent:" Why did you have a comma in the sentence, 'After dinner, the men went into the living-room'? "And his answer was probably one of the loveliest things ever said about punctuation." This particular comma, "Thurber explained," was Ross's way of giving the men time to push back their chairs and stand up.”
― Lynne Truss, Eats, Shoots & Leaves: The Zero Tolerance Approach to Punctuation