It's a sign!!!

Walking back to the lab after lunch, I looked up and saw this cloud up in the sky. (Very Amelie, you would say, eh?)

It sort of looked like a dog's head to me. (I've marked it with an arrow in case you're thinking, "Huh?")

Dog reminded me of "Call of the Wild"

Call of the Wild was written by Jack London

London!

Get it? It's a goddamn sign.