An invisible man is here to see you
Nurse: Doctor, there is an invisible man in your waiting room.

Doctor: Tell him I can't see him now. Next.

Bad News and Good News
Jill phoned her husband, John, at work for a chat. "I'm sorry dear," said John, "but I'm up to my neck in work today. I don't have time to chat."

Jill replied, "But I've got some good news and some bad news for you, dear."

"OK darling," said John, "but as I've got no time right now, just give me the good news."

"Okay," agreed Jill. "Well, the air bag works...bye!"