Lady un Dark dress

When you see a woman dressed completely in black turn around and count to ten with your eyes closed and go to the light end.
One day we were with some friends on the terrace of the house of one of them, we looked at the people passing by (the terrace overlooking the street) and suddenly one of my friends saw a lady in all black and told us:
"Quick: Quick! Turn around and count to ten .... close your eyes. "
What happened?. I Said , when I finished having opened my eyes and saw the tail of a black dress, I was scared and thought I noted a bus that was passing by.
I asked my friend what happened and told me that when we see a woman all in black to turn around and count to ten and at the end we look towards the light, and that this woman could be the devil, while we went back to see as another woman and did the same again.
½ When we entered the house and saw the news on television: a bus killed two black women on the street.
Now do what I told them that if they do not ...