Joseph. the Halacha’s zeman. I have seen minyanim davening Shacharit ten minutes before the time for Mincha.
Eliezer, I think that people were antsy so they hung it on a pasuk. Rambam says that it means that a person should serve Hashem with his entire being. As for Rav Moshe, he was told by an NKVD interrogator not to move a muscle or else. Rav Soloveichik also stood at attention. Rambam says that one should stand still with one’s hands folded on one’s chest. Apparently jn his time and place this was the posture of supplication.