A doctor puts a blonde on a diet: eat for two days, skip a day, repeat for two weeks. He promises she’ll lose at least five pounds.
When she returns, she’s lost nearly 20 pounds.
Shocked, the doctor asks, “Did you follow the plan?”
She nods and says, “Yes… but I almost dropped dead on the third day.”
“From hunger?” he asks.
“No,” she replies. “From skipping!” 
Sometimes instructions really matter!