These are good ones...

Time flies like an arrow. Fruit flies like a banana.

Condoms should be used on every conceivable occasion.

Energizer Bunny arrested - charged with battery.

Le theif
Recently a guy in Paris nearly got away with stealing several paintings from the Louvre. However, after planning the crime, breaking in, evading security, getting out and escaping with the goods, he was captured only two blocks away when his Econoline van ran out of gas.
When asked how he could mastermind such a crime and then make such an obvious error, he replied:

"I had no Monet to buy Degas to make the Van Gogh."

A Dog Named Mace
A mechanic who worked out of his home had a dog named Mace. Mace had a bad habit of eating all the grass on the mechanic's lawn, so the mechanic had to keep Mace inside.
The grass eventually became overgrown. One day the mechanic was working on a car in the backyard and dropped his wrench, losing it in the tall grass.

He couldn't find it for the life of him, so he decided to call it a day.

That night, Mace escaped from the house and ate all the grass in the backyard. The next morning the mechanic went outside and saw his wrench glinting in the sunlight.

Realizing what had happened he looked toward the heavens and proclaimed,

"A grazing Mace, how sweet the hound, that saved a wrench for me!"