"Billiard" is from a French word meaning "stick of wood"; I can't find out the etymology of "milliarde." My usual site says that it's "million" with a changed suffix, which is not terribly helpful.
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"