An odd thing that happened in an odd place
Ping-pong balls are useful. Historic evidence:
A Japanese freighter had been torpedoed during WWII and it’s at the bottom of Tokyo Harbor with a large hole in her hull. A team of engineers was called together to solve the problem of raising the wounded vessel to the surface. One of the engineers tackling this puzzle said he remembered seeing a Donald Duck cartoon when he was a boy where there was a boat at the bottom of the ocean with a hole in its hull, and they injected it with ping-pong balls and it floated up. The skeptical group laughed but one of the experts was willing to give it a try. Of course, where in the world would you find twenty million ping-pong balls but in Tokyo? It turned out to be the perfect solution. The balls were injected into the hull and it floated to the surface, the engineer was elated. Moral solutions to problems are always found at an entirely different level; also, believe in yourself in the face of impossible odds.
Tom Waits, True Confessions
More evidence. Go figure …