2010-11-19 - Randburg (Johannesburg) (South Africa) - Unknown

occurred round-about 20:30 to 22:00 i looked into the clear sky , and notice a large single bright light heading towards me (not for me)high in the sky( not many commercial planes would fly that height). I was looking NE(north east direction) my first impression was a plane with a bright front light on after take-off. but soon after a minute it changed direction(east to south)and narrowed in brightness then blacked out. A second later a quick flicker then nothing.....no sound lagging from behind the object. About 2 and half mins later a plane with its flickering lights at a lower altitude flying unknown to it almost parallel to the path of the object. I guess a plane from Lanseria Airport on its way to cape town. What was that object in the sky??? (