The black screw

By chance i stepped on a black screw lying on the floor next to my bungy chair. I was curious. I examed my chair up and down , side to side hoping that i will find out where it screwed to. Not a clue. With frustration i gave up fixing. I was wasting my time and effort try to put that little thing back to the chair . May be it wasn't come from the chair as i thought it was. It occured to me that "Assumption can kill ". I smiled and quickly blogged this.