Smaller people whose heads are lower than seat backs in front of them were probably better shielded from debris in a plane that 's coming apart .
The main ' study by doing ' experience and hereupon jumps out after it .
Smaller people whose heads are lower than seat backs in front of them were probably better shielded from debris in a plane that 's coming apart .
The main ' study by doing ' experience and hereupon jumps out after it .