Except we're not allowed to stand up during taxi. (And for the most part, I think that's a good policy, if everyone was standing up with their arms over their h

Except we're not allowed to stand up during taxi. (And for the most part, I think that's a good policy, if everyone was standing up with their arms over their heads holding a rolling suitcase, a slight swerve could actually hurt people.) Also, sitting down with a rolling suitcase on one's lap isn't really practical either.