Can you think of a time when life handed you a lemon?
It usually comes in some form of loss. The job ended unexpectedly, someone's health took a turn for the worse, you were passed over for that promotion you felt you deserved, or you lost your best girlfriend.
In each case, the unexpected happened. Or what was hoped for - even planned for, didn't happen. You have suffered a loss. A loss you didn't see coming.
It is that element of surprise that makes the lemons we all get handed in life sometimes well, suck.
How did you overcome it?