Mysterious bright green light flying un predictably across the sky then dissapearing

I was casually looking at the sky at around 7:45 pm i live in ngong close to matasia i saw a bright green light shoot accross the sky in the distance preety high it moved so fast in some very wierd pattern and then dissapeared im a casual plane spotter and im very sure that was not a plane , anyone else see any such sightings i need peace of mind here this all happened in less than 10 seconds