If you see a bank robber take your three-days-from-retirement partner hostage, he may order you to stand back.
If you see a squad of soldiers aiming their weapons at a newly-discovered ally, you can tell them to stand down.
If you win the high noon quick-draw shootout with the evil sheriff, you can stand over his corpse.
If you have to give a valedictorian speech, you can stand on a podium.
If your friend has been falsely accused of leaking state secrets to the super-terrorists, you can stand behind her.
However, if you’ve decided you no longer want to sit in that chair, you do not have to stand up. You can just stand. No direction needed.
That is all.