from previous

....a man  goes to a most  famous  and busy  doctor for a check up,  after  a long wait for over a hour  he got to see the doctor,  before he could  tell  what was  troubling him  the doctor  got a phone call he had to attend  , , like wise  every other  minute  a phone   rang up disrupting  their conversation,  finally  the man got up to leave,  the doctor asked him  holding on to the  phone where was he going 

The man explained to the nearest telephone booth