Geezer

An old geezer became very bored in retirement and decided to open a medical clinic.
He put a sign up outside that said: "Dr. Geezer's clinic. Get your treatment for $500, if not cured, get back $1,000."
Doctor "Young," who was positive that this old geezer didn't know beans about medicine, thought this would be a great opportunity to make an easy $500. So he went to Dr. Geezer's clinic.
Dr. Young: "Dr. Geezer, I have lost all taste in my mouth. Can you please help me ??"
Dr. Geezer: "Nurse, please bring medicine from box 22 and put 3 drops in Dr. Young's mouth."
Dr. Young: Aaagh !! -- "This is Gasoline!"
Dr. Geezer: "Congratulations!
You've got your taste back. That will be $500.
Dr. Young gets annoyed and goes back after a couple of days figuring to recover his money.
Dr. Young: "I have lost my memory, I cannot remember anything."
Dr. Geezer: "Nurse, please bring medicine from box 22 and put 3 drops in the patient's mouth."
Dr. Young: "Oh, no you don't, -- that is Gasoline!"
Dr. Geezer: "Congratulations! You've got your memory back . That will be $500."
Dr. Young (after having lost $1000) leaves angrily and comes back after several more days.
Dr. Young: "My eyesight has become weak --- I can hardly see anything!"
Dr. Geezer: "Well, I don't have any medicine for that so, here's your $1000 back." (giving him a $10 bill)
Dr. Young: "But this is only $10!"
Dr. Geezer: "Congratulations! You got your vision back! That will be $500."