The Pakistan International Airlines (PIA) jet came down in a residential area after an aborted landing where it had already scraped along the runway at high speed.
Witnesses reported the aircraft, which had lost two engines, circled Jinnah International Airport two or three times before plummeting and destroying several buildings.
And Zafar credits his lucky escape from certain death to his decision to swap from a place by the window, to aisle seat 1C on that terrible day.
In a tragic twist of fate, the passenger who he switched seats with was one of the many who perished in the devastating incident.