It really depends on just what it is that I'm entering. Would I be known? A stranger? Am I an opponent? An ally? I can't treat just any situation the same way, or else I'd be mad and incarcerated/dead already.
*Comes home to greet the wife*
"Falcon puuuuuuuunch!"
*Sends wife flying*
"What's for dinner, honey?"
...
"...Honey?"
None of the options really cover what I'd do. If I were welcome in the place that I would be entering (or at least not seen as a threat), of course I'd act natural; I'd have no reason to gun people down and/or commit my fist to the art of brutal plastic surgery. If I weren't welcome, but had to do some dirty work, I wouldn't draw attention to myself unless it didn't compromise my reason for being present.
It seems like the question is geared toward something militaristic, but it's not so clear. Even if it were, there are still a few general bases left to cover in the poll, that you didn't think of.