Chemist walks into his shop to find a guy leaning against the wall.
"What’s wrong with him?" he asks his assistant.
"He came in for cough syrup", the assistant explains "but as we are out of it I gave him laxatives instead."
"What!" the horrified chemist exclaims,"you cannot treat a cough with laxatives!"
"Sure you can", the assistant declares, "look at him - he’s way too scared to cough."
*And that's how the term "shit scared" was coined!