Johnny was at the corner "Mom & Pop" grocery picking out a pretty good
size box of laundry detergent.

The grocer walked over, and, trying to be friendly, asked the boy if
he had a lot of laundry to do.

"Oh, no laundry," Johnny said, "I'm going to wash my dog."

"But you shouldn't use this to wash your dog.  It's very powerful and if you wash 
your dog in this, he'll get sick.  In fact, it might even kill him."

But Johnny was not to be stopped and carried the detergent to the counter and paid 
for it, even as the grocer still tried to talk him out of washing his dog.

About a week later Johnny was back in the store to buy some candy.
The grocer asked the boy how his dog was doing.

"Oh, he died," the  boy said.

The grocer, trying not to be an I-told-you-so, said he was sorry the dog died 
but added, "I tried to tell you not to use that detergent on your dog."

"Well," Johnny replied, "I don't think it was the detergent that killed him."

"Oh?  What was it then?"

"I think it was the spin cycle!"