I was in the military of course, so mistakes in military matters bother me more than they should. Like this sentence from Rick Yancey’s The Fifth Wave.
I sink into the chair, sitting on its edge, back straight, chin up. If it’s possible to be at attention while seated, I’m doing it.
It is possible and taught in the military. Admittedly, it’s not all that common, but every military recruit ever has done it and knows how to sit at attention.
