Here are some situations where you might have trouble keeping your cool.

• You drop your cell phone and somebody steps on it, destroying it.
• Someone hits your compact car with their SUV.
• You are a clerk in a store and a furious customer brings back a defective product.
• Two of your friends have a fight, decide they hate each other, and insist you take sides.
• Your parent has had a bad day and takes it out on you with constant criticism.
• Your sibling will not leave you alone.
• A friend asks you for the five millionth time to loan them something you know you will never get back.
• Your boyfriend or girlfriend breaks up with you with an email or text.
• A slacker at work messes something up, blames it on you, and you get fired.
• A friend borrows your car and gets in a wreck, totaling your car. Your friend was at fault.
• A shipping company lost the package your brother sent you. When you call, they treat you disrespectfully, tell you there's nothing they can do, and warn you not to call again.
• When you call tech support for your computer, you get a technician whose accent makes it hard for you to understand what they are saying. You cannot tell if this person understands what you are saying, either.
• You've been in line for a long time. When you finally step up to the counter, the cashier closes the line.