The game of cricket was called after the insect of the same name because of the similarity between the sound of the bat on the ball and the noise made during mating.
In Dad's Army, Captain Mainwaring's famous line, "You stupid boy," was originally written as "You f***ing tw*t, Pike," and was only changed at the very last minute after concerns were raised among BBC bosses.
If a meteorite the size of a house brick were to strike Loch Ness, all life within the Loch would be ended and thus conclusive proof of the exictence or otherwise of Nessis would be garnered.