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

Half right face front leaning Rest! Knocking out numbnuts

HALF RIGHT...

make sure E2 realizes he is in the wrong - explain this along with what possible outcomes there could be and give him a chance to apologize and recant or suffer military consequences under UCMJ

I would finish handing out the rest of the work for the day before I would address him and make sure to keep a battle buddy behind for him to ensure there is a witness to his write up for his blatant disrespect and for his corrective training I would have him do that duty that he spoke out about for the rest of the week so he would learn that a private in the military doesn't get the right to choose what duties to do or not.

Give them a worse job, or council them before considering an article 15.

PFC "Special Boy" is having an optical malfunction. He does not see that he is a part of a functioning machine that does not break down. Showing PFC the strength of this machine may motivate him. Everyone needs to drop and do pushups accept PFC "Special Boy". while PFC "Special Boy" counts off each push up for everyone else, his optical malfunction should repair it's self. He will begin to see he is a part of something that does not easily give up or just stop functioning. As all other solders recover, PFC "Special Boy" will be able to see the value of his assignment for the day and his optical malfunction should be completely repaired. If not, the machine he is a part of, has a way of helping him with his optical malfunction.

100 pushups

Tell him to shut up, talk to him after formation, counsel him and find out what the problem is and act accordingly

Lock his ass up, and then put him in the leaning rest position, untile he cant pick his head up from the ground . It worked for me.

Write his ass up and continue to assign him the same job. Each time he refuses, it's another charge.