Fart crescendo

When I was a kid, fart rhymes were the fad. Nowadays, fart is now longer a taboo, even Leno does them. Here are two of my favorites.

There once was a man from Rangoon
Whose farts could be heard on the moon;
When you'd least expect 'em
They'd burst from his rectum
With the force of a raging typhoon!!

Gene, Gene made the machine, Frank Frank turned the crank.
Art, Art let a fart and blew it all apart