A general view of the cabin of Singapore Airlines flight SQ321, which was hit by severe turbulence.
Severe turbulence dislodged oxygen masks and caused injuries to dozens of passengers on Singapore Airlines flight SQ321.
  • Singapore Airlines' deadly flight turbulence was so bad the plane dropped 178 feet in four seconds.
  • Investigators say the G-forces in the plane caused passengers to fly out of their seats. 
  • The turbulence over Myanmar led to one death and over a hundred injuries, some severe.

The turbulence on the deadly Singapore Airlines flight last week was so severe that the plane dropped 178 feet in just four seconds, investigators say.