An overweight blonde consulted her doctor for advice. The doctor said she should run ten miles a day for thirty days. This, he promised, would help her lose the 20 pounds she's been trying to get rid of.

The blonde followed the doctor's advice, and, after thirty days, she was pleased to find that she had indeed lost the pesky 20 pounds.

She then phoned the doctor and thanked him for the wonderful advice which produced such effective results.

At the end of the conversation, however, she asked one last question:

"How do I get home, since I am now 300 miles away?"