Sophos has verified (not that we needed them to) this is a hoax:
Subject: Fw: PLEASE DO THIS, IT IS HYSTERICAL!
An old lady walked into a Grocery Store.
She wanted to buy the best dog food in the world
for her little puppy.She went up to the cash register to buy the food.
The saleslady told her that the store did not allow
old ladies to buy animal food unless they show the
actual animal because a lot of old ladies like to
eat the animal food themselves.So, the old lady went home, got her dog and went
back to the store to buy her dog food.The next day she came back to buy the best cat
food around.But the Sales lady told her the same thing, so the
old lady went back home and brought her cat to the
Grocery Store to buy the cat food.The next day the old lady went to the Grocery Store
again carrying a big container.She went up to the the sales lady and said, “Put
your hand inside here “..The Saleslady shook her head. ” NO ” , she said,
“there is probably something in there that will
bite me!” .“I promise you there is nothing in here that will
bite you,” the old lady said.So the Saleslady stuck her hand inside the container
and screamed.To find out what was inside the container you
must send it to at least 8 people.When the computer says your mail has been sent,
hit ALT-8 and the container will pop up on your
screen.
Please do not forward these type of things. They waste people’s time and bandwidth.