That would be considered EXTREMELY bad form where I come from (USMC, 1967-1993) and likely would get the one who done it a mouthful ofknuckles from the one who was did. Then the instructor or the skipper would have more than a few words for the doer, absolutely NONE of them kind or endearing.
That’s what I thought.
I was a pilot (IDF), so my small arms skills are limited, but even I cringed.