From a parsha sheet for Pinchas:
"HaRav Ben Zion would always flee from honor. Every Shabbat after Mincha, he would deliver a Shiur. In his great humility, he was bothered by the fact that everyone stood up for him when he entered the Shul. In order to avoid this, HaRav Ben Zion decided to enter the Shul when they will open the Aron Kodesh to take out the Sefer Torah. That way, everyone would stand up anyway, not purposely for him."I do this to, only for Shachris.