An Engineer opened a medical clinic and put a sign up outside: “Get your treatment for $500, if not cured get back $1,000.”
One Doctor thinks this is a good opportunity to earn $1,000 and goes to his clinic.
Doctor: “I’ve lost taste in my mouth.”
Engineer: “Nurse, please bring medicine from box 22 and put 3 drops in the patient’s mouth.”
Doctor: “This is Gasoline!”
Engineer: “Congratulations! You’ve got your taste back. That will be $500.”
The Doctor gets annoyed and goes back after a couple of days later to recover his money.
Doctor: “I’ve lost my memory, I can’t remember anything.”
Engineer: “Nurse, please bring medicine from box 22 and put 3 drops in the patient’s mouth.”
Doctor: “But that is Gasoline!”
Engineer: “Congratulations! You’ve got your memory back. That will be $500.”
The Doctor leaves angrily and comes back after several more days.
Doctor: “My eyesight has become weak.”
Engineer: “Well, I don’t have any medicine for this. Take this $1,000.”
Doctor: “But this is only $500…”
Engineer: “Congratulations! You got your vision back! That will be $500.”