Video 10.
Download video file (342KB, 3gp)
DOI: 10.1177/2333393615575321.M10
Participant pulling lowered rail to turn.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.