Basically it's just a rigid bracket for him to hold while he fires the remote with his incapacitated hand; he can't do everything, but he can at least hand-hold the camera and get the shot.
As such, he was more intellectually supple than his older brother, whose big man on campus background may have made him too rigid for presidential campaigning or too prone to listen to the experts.
Oliver's distinction proves far too rigid and binary, even for him.
This meticulous, but not rigid, preparation made it possible for him to shoot that film in only twelve days (and I've often said that the best directors also have original approaches to the material and practical side of production).
For him the rigid categories between religion, gender and sexuality did not exist.
Military life proved too rigid for some.
The Germans bored everybody rigid for eighty-odd minutes.
The Pope's anti-Communism was too rigid for the C.I.A.
In Japan, the close industrial partnerships known as keiretsu have proved too rigid for some manufacturers.
You can't tell, because his face has been fixed rigid for about five years, but he does.
