A man walks into a doctor's office and the doctor sits him down.
"OK what is your problem sir?"
"I am half deaf" he replied.
"That's ridiculous! You can't be half deaf! There is no such thing!"
"Yes there is!"
"OK OK! Go down the hall and I'll shout a number and you shout it back".
"OK!" He said
When he got to the end of the hall the doctor shouts down, "88"