That's one of the finest compliments one can receive, to be compared with Douglas Adams. Thank you :)
I am delighted also, that you see that I wanted to make a point by turning what threatened to become a theoretical conversation into "driving it home" through the happening of the avalanche. Nice, that you mention it!
We are two know. I did some research for this story and also heard "the three P's and a W" verbalized in this certain manner, for the first time. I think it might become a winged phrase.