Everybody will agree that the chance of snake eyes at dice is 1/36, for example. While diferent people will assign different probabilities to "a whale will fall from the sky into the Grand Canyon", most will pick a very small number.
This recent BBC article may interest you.'Scientists count whales from space' http://www.bbc.co.uk/news/science-environment-26075274
And I didn't even know that whales came from space.

http://www.youtube.com/watch?v=YCsfHVM5x_I
I presume you are a fellow Brit... or maybe a spaceman.
Didn't Star Trek make a film about a whale too? I am detecting a pattern here. Maybe the extraterrestrial Illuminati are whales, not lizards. The evidence is growing.