Something that has never happened

Something that has never happened before:
You.
But be careful
You may not really happen at all
It happens a lot
You may just be happened upon
You know,by life, or rather
By what happens while life passes by unnoticed
So be be careful,well no 
Don't be careful
Then you might stand a chance.
It happens,
Sometimes.                                    
                                                                              Wilf 11/2005