Late for Work

Bob had this problem of getting up late in the morning and was always late for work.
After a few weeks of this, his boss was mad and threatened to fire him if he didn’t do something about it.
So Bob went to his doctor, who gave him a pill and told him to take it before he went to bed. He got a great night’s sleep and actually beat the alarm in the morning. After a leisurely breakfast, he cheerfully drove to work.
“Boss,” he said as soon as he got to work, “The pill my doctor prescribed actually worked!”
“Well, you’re on time, that’s sure,” said the boss, “but where were you yesterday?”