A man is on a flight from New York to Chicago biting his finger nails and sweating profusely.

Noticing his disturbed expression, a flight attendant walks over and says, “Sir, can I get you something from the bar to calm you down?”

The man gives a nod of approval while shaking terribly. Seconds later, she comes back with a drink. He downs it quickly and stops shaking. Ten minutes later, the flight attendant sees the same man shaking and biting his nails. She brings him another drink, which he swallows immediately. A half hour later she returns to see that the man is shaking uncontrollably, and apparently crying.

“My goodness,” the flight attendant says, “I’ve never seen someone so afraid to fly.”

“I’m not afraid of flying,” says the man.

“Then what is the matter?”

Sobbing loudly, he says, “I am trying to give up drinking.”