Lawyer (annoyed): “This is kerosene. You gave this to me last time for restoring my taste.”
Chinese: “Congrats. You got your memory back. Give me $20.”
The fuming lawyer pays him, then comes back a week later determined to get back $100.
Lawyer: “My eyesight has become very weak I cannot see at all.”
Chinese: “Well, I don’t have any medicine for that, so take this $100.”
Lawyer (staring at the note): “But this is $20, not $100!”
Chinese: “Congrats, your eyesight is restored. Give me $20”