How would you react to an E2 who "smart mouths" you in formation?

Drop and give me 50 then report to CO for article 21

Most of the newbies greenhorns lack the respect that the higher commands have to watch over others and learn that everyone has been there. They need to follow orders and respect the higher command. I learned it, no big deal. Suck it up and carry on. Makes you part of the team. That's why they called it the United Armed Forces.

Yeah that shouldn't happen I'm an E-2 and I'd never do that out of respect I'll make t to E-5 someday and then I'll get respect like that

Chew him out

Give him a lawful order, if he still refuses, take him to the ISG. Np it in the bud.

100 pushups or the stockade...

Throat pumch

Test the limits of his or her physical endurance followed by doubling the assigned duty

The dying cockroach!

In my day ass whooped and am article 15

Well after I got done feeling extremely frisky, I would tell this pvt that he was absolutely correct to not want to do his duty. I would then ask if he was familiar with how I ran my men and use an example, there are many, of someone else who shirked duty and the ensuing result.
Woe and doom on to you my example.

2 months extra duty.

100 push ups followed by the dead cockroach position for fifteen minutes

Lock him up and let him have it ! NO doubt! The real issue here isn't with this specific situation between this soldier and this NCO, the question is "Why does this soldier have a mind set that allows him to think he can disrespect a NCO when given orders?" It sounds like either that particular NCO had a lock of professionalism that put him in the position, or the Army has changed to the point where that type of behavior has been tolerated. Either way I say Lock his Ass up and let him have it!

Respectful he sounds like a stuck up asswhole or whole ass which ever

I'd put him as squad leader over his whole squad and tell them they have less than 2 hours to construct a medium girder bridge with flak and Kevlar or else they will be doing it again the next day and see if he talks back again.

EXTRA MILITARY INSTRUCTION (EMI) and if that didn't work Captains
Mast

I would write him up so he would face article 15 for failure to follow a law order. This would be the first step. Second step would be to recommend reduction in rank and forfeiture of 3 months pay to the Company Commader.

Rip his soul from his chest and eat it in front of the rest of formation

Remain after formation with team leader for counseling, if result not satisfactory, formal punishment/consequences