Am neither a superstitious man nor I believe in KARMA where in what you do will result good or bad thing to you. And I don't believe also that man will die today and born again in a different human body or a bug. :)
Karma (Sanskrit: kárma (help·info), kárman- "act, action, performance"; Pali: kamma) is the concept of "action" or "deed" in Indian religions understood as that which causes the entire cycle of cause and effect (samsara) described in Hindu, Jain, Sikh and Buddhist philosophies.
information from wikipedia
Lets examine what I think is karma.
What you sow you reap, it is as simple as that.
But sadly to say it does not always work that way. What you sow you reap is true in the plant cycle. Are all truth is parallel?
Have you done well and the result is bad?
All truth is parallel but on a certain point and nature.
In the plant cycle, if you plant mango you will harvest mango. It can not produce fruit other than mango.
But in the good deed cycle, not all good work will produce good deed. You must have the proper motive for a good deed to be good work.
A good example will be is the deed of the Generous King.
The Generous King saw one day a beggar and ask.
"Why are you begging for food?"
"I have no food" the beggar replied.
The King thinks awhile and said to him self
"I have lots of food in the palace"
And the King said to the beggar
"Come with me to the palace I will give you food"
"Thank you oh King" said the beggar.
The beggar walks with the King to the palace
On there way the other beggar saw them walking and they ask the beggar
"Why are you walking with the King?"
"The King is giving me food"
"Can we go also with you?"
The King hear them talking and said
"Come, go with us"
On there way to the palace, group of people saw them and learn that the King is giving them food. The King also invited them to the palace.
The palace have been filled of people wanting to eat the King food.