From CBC TV interview. Transcribed from memory.
Cabin crew overheard saying "plane overweight".
Happening very quickly over 3 minutes. 1 engine "out", then 2nd engine "out", then impact.
Lots of fuel. A young passenger drenched in fuel, hanging upside down, and in shock. After he liberated himself he walked to the road under moonlight to alert the drivers as the rescuers were going to wrong location beyond the crash and had to make u-turns.
At least 1 passenger trapped inside plane for 3.5 hours.
Opening exit doors was almost impossible.
EDIT: This is from interview with the young passenger stated above.