What is an Example of karma in real life?

In this world some events happen for which the causes are not readily evident. The fastest runner may stumble and lose the race. A mighty army may go down in defeat before inferior forces. A wise man may be unable to get a good job and may therefore suffer hunger. People with Excellent understanding of business management may, because of circumstances, be unable to put their knowledge to work and thus find themselves in poverty. Knowledgeable individuals may incur the wrath of those in authority and come to be in disfavor. Why is this so? "Because time and unforeseen occurrence befall them all," answers wise King Solomon. (Ecclesiastes 9:11)