Horror on board

Passengers of line of "Singapore Airlines" experienced a real horror  in flight, when their plane fell 20 feet spontaneously and violently when faced with a strong air turbulence.

The incident happened at a time when food is distributed

  Some of the drinks that are distributed by the flight assistants, and ended up at the ceiling.
As a result of this drastic decline, 11 passengers were not kept on the safety belt , a staff member were injured.
Chaotic collapse occurred while the "Airbus" was in  the landing stage, all the injured were assisted immediately after landing at the airport "Heathrow" in London.