A lecture about English
A linguistics professor was lecturing to his English class one day. "In English," he said, "A double negative forms a positive. In some languages, though, such as Russian, a double negative is still a negative. However, there is no language wherein a double positive can form a negative."

A voice from the back of the room piped up, "Yeah, right."

Absentminded Doctor to Patient
After a relaxing vacation, the doctor go in to see his
patient. The doctor says, "I have some bad news and some even
worse news. The bad new is you only have a week to live."

The patient replies, "Oh my God! What could be worse?"

The doctor replies, "I should have told you last week."