Senryus are basically Haikus, in that they follow the syllabic pattern of 5, 7, 5, but are more observational/descriptive than poetic/lofty. So naturally, if done right, they can be pretty funny.

3 attempts at original senryus:

“I’m birthday shopping!”
While in Incognito Mode;
The words of a fraud.

He yelled, “OH DEAR GOD,
IT’S LIKE Y.2.K. AGAIN!”
Pretty boring day.

“Such lovely sculptures!”
Said the Post-Modern Theorist,
In the produce aisle.

Can you guys think of any more?